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Face Masks May Not Protect from Super-Flu
if a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.
But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."
When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.
Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.
During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.
Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.
Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing.
Face Masks May Not Protect from Super-Flu
if a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.
But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."
When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.
Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.
During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.
Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.
Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing.
The CDC suggests that people______.
A: stay alone when being sick
B: wear face masks when going to a crowded place
C: wear face masks wherever possible
D: remain at home if living with someone who's sick
A: stay alone when being sick
B: wear face masks when going to a crowded place
C: wear face masks wherever possible
D: remain at home if living with someone who's sick
参考答案
参考解析
解析：主旨大意题。文章第一段是主旨段落，质疑口罩在下一次世界范围的流感爆发时能够帮助人类。故本题选D。
根据第三段推断出，美国疾病控制和预防中心建议人们外出去人群中时带上口罩。选项A和D看似合理，但并没有提到口罩的使用，与文章的主题关系不大，排除。
根据文章第二段“The overall recommendation really is to avoid exposure.”可知，美国疾病控制和预防中心建议真正能为下一次流感大爆发做的准备是“avoid exposure"，而第三段中的that正是指美国疾病控制和预防中心的建议“avoid exposure"。
根据第四段“Scientists cannot predict when...if it starts spreading easily from person to person.”可知，如果亚洲的禽流感开始轻易地在人与人之间传播，就可能会引起一场大流行性疾病，虽然人们的忧虑不断升级，但科学家仍无法预测这样的大暴发什么时候会出现。因此选项A,B错误。根据第六段可知，流感爆发时，口罩并不能有效保护人们远离流感，故C项错误，D项正确。
根据第五段“Besides, the CDC is afraid masks may create a false sense of security.”可知，美国疾病控制和预防中心担心口罩可能会制造出一种虚假的安全感。
根据第三段推断出，美国疾病控制和预防中心建议人们外出去人群中时带上口罩。选项A和D看似合理，但并没有提到口罩的使用，与文章的主题关系不大，排除。
根据文章第二段“The overall recommendation really is to avoid exposure.”可知，美国疾病控制和预防中心建议真正能为下一次流感大爆发做的准备是“avoid exposure"，而第三段中的that正是指美国疾病控制和预防中心的建议“avoid exposure"。
根据第四段“Scientists cannot predict when...if it starts spreading easily from person to person.”可知，如果亚洲的禽流感开始轻易地在人与人之间传播，就可能会引起一场大流行性疾病，虽然人们的忧虑不断升级，但科学家仍无法预测这样的大暴发什么时候会出现。因此选项A,B错误。根据第六段可知，流感爆发时，口罩并不能有效保护人们远离流感，故C项错误，D项正确。
根据第五段“Besides, the CDC is afraid masks may create a false sense of security.”可知，美国疾病控制和预防中心担心口罩可能会制造出一种虚假的安全感。
更多 “共用题干 Face Masks May Not Protect from Super-Fluif a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing. The CDC suggests that people______.A: stay alone when being sickB: wear face masks when going to a crowded placeC: wear face masks wherever possibleD: remain at home if living with someone who's sick” 相关考题
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Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 But it's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere , " said the CDC. " The overall recommendation really is to avoid exposure."3 When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose ormouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.Paragraph 5_______________A:Reasons for Excluding Masks From the Self-protection ListB:Effort to Stop Flu From SpreadingC:When to Use Face MasksD:Guideline on Mask Use E:Warnings From the CDCF:Danger of Infection Through Germy Hands and Masks
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Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 But it's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere , " said the CDC. " The overall recommendation really is to avoid exposure."3 When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose ormouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The CDC is afraid that the public may________________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesF:help protect people from being attacked by a flu F: announce the results of their mask research
考题
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Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 But it's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere , " said the CDC. " The overall recommendation really is to avoid exposure."3 When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose ormouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The public will not know the answer about masks until scientists_______________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesF:help protect people from being attacked by a flu F: announce the results of their mask research
考题
共用题干
Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 But it's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere , " said the CDC. " The overall recommendation really is to avoid exposure."3 When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose ormouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The scientists are trying to find out if masks may or may not________________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesF:help protect people from being attacked by a flu F: announce the results of their mask research
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Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 But it's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere , " said the CDC. " The overall recommendation really is to avoid exposure."3 When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose ormouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.We can infer from the passage that the US authorities_______________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesF:help protect people from being attacked by a flu F: announce the results of their mask research
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1.If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says peoph should consider wearing them in certain situations anyway, just in case.2.But it's a question the public keeps asking while the government are making preparations for the next flu pandemic.So the Centers for Disease Control and Preventions(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."3.When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second,you're sick and think you may have close contact with the healthy,such a, a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4.Influenza pandemics can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill fitting mask and hop on the subway instead.6.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7.Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The CDC is afraid that the public may_________.A:overuse face masksB:deal with the mask problem seriously C:rub their faces and noses in the subway D:protest against the mask guidelinesE:help protect people from being attacked by a flu F: announce the result of their mask research
考题
共用题干
1.If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says peoph should consider wearing them in certain situations anyway, just in case.2.But it's a question the public keeps asking while the government are making preparations for the next flu pandemic.So the Centers for Disease Control and Preventions(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."3.When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second,you're sick and think you may have close contact with the healthy,such a, a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4.Influenza pandemics can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill fitting mask and hop on the subway instead.6.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7.Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The scientists are trying to find out if masks may or may not________.A:overuse face masksB:deal with the mask problem seriously C:rub their faces and noses in the subway D:protest against the mask guidelinesE:help protect people from being attacked by a flu F: announce the result of their mask research
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共用题干
1.If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says peoph should consider wearing them in certain situations anyway, just in case.2.But it's a question the public keeps asking while the government are making preparations for the next flu pandemic.So the Centers for Disease Control and Preventions(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."3.When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second,you're sick and think you may have close contact with the healthy,such a, a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4.Influenza pandemics can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill fitting mask and hop on the subway instead.6.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7.Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.Paragraph 2________.A:Reasons for excluding masks from the self-protection list.B:Effort to stop flu from spreading.C:When to use face masks.D:Guidelines on mask use.E:Warnings from the CDC.F:Danger of infection through germy hands and masks.
考题
共用题干
1.If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says peoph should consider wearing them in certain situations anyway, just in case.2.But it's a question the public keeps asking while the government are making preparations for the next flu pandemic.So the Centers for Disease Control and Preventions(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."3.When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second,you're sick and think you may have close contact with the healthy,such a, a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4.Influenza pandemics can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill fitting mask and hop on the subway instead.6.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7.Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.We can infer from the passage that the US authorities_________.A:overuse face masksB:deal with the mask problem seriously C:rub their faces and noses in the subway D:protest against the mask guidelinesE:help protect people from being attacked by a flu F: announce the result of their mask research
考题
共用题干
1.If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says peoph should consider wearing them in certain situations anyway, just in case.2.But it's a question the public keeps asking while the government are making preparations for the next flu pandemic.So the Centers for Disease Control and Preventions(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."3.When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second,you're sick and think you may have close contact with the healthy,such a, a family member checking on you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.4.Influenza pandemics can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill fitting mask and hop on the subway instead.6.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7.Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The public will not know the answer about masks until scientists _______.A:overuse face masksB:deal with the mask problem seriously C:rub their faces and noses in the subway D:protest against the mask guidelinesE:help protect people from being attacked by a flu F: announce the result of their mask research
考题
共用题干
Face Masks May Not Protect from Super-Fluif a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing. Which of the following statements is true?A: Scientists warn the next flu is coming soon.B: Asian bird flu is spreading easily from person to person.C: Masks protect people because they keep viruses away.D: Masks are not effective if a flu strikes.
考题
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Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,orharm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 Butit's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere,"said the CDC. " The overall recommendation really is to avoid exposure."3 When that'S not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a' crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who'S sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou-- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you'ye been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The public will not know the answer about masks until scientists_________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesE:help protect people from being attacked by a fluF:announce the results of their mask research
考题
共用题干
Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,orharm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 Butit's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere,"said the CDC. " The overall recommendation really is to avoid exposure."3 When that'S not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a' crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who'S sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou-- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you'ye been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The scientists are trying to find out if masks may or may not__________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesE:help protect people from being attacked by a fluF:announce the results of their mask research
考题
共用题干
Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,orharm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 Butit's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere,"said the CDC. " The overall recommendation really is to avoid exposure."3 When that'S not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a' crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who'S sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou-- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you'ye been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.The CDC is afraid that the public may________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesE:help protect people from being attacked by a fluF:announce the results of their mask research
考题
共用题干
Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,orharm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 Butit's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere,"said the CDC. " The overall recommendation really is to avoid exposure."3 When that'S not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a' crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who'S sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou-- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you'ye been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.We can infer from the passage that the US authorities_________.A:overuse face masksB:deal with the mask problem seriouslyC:rub their faces and noses in the subwayD:protest against the mask guidelinesE:help protect people from being attacked by a fluF:announce the results of their mask research
考题
共用题干
Face Masks May Not Protect from Super-Fluif a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing. The word"that" in Paragraph 3 refers to______.A: making preparationsB: avoiding exposureC: coming up with guidelinesD: wearing face masks everywhere
考题
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Face Masks May Not Protect from Super-flu1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,orharm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet.However,the government says people should consider wearing them in certain situations anyway,just in case.2 Butit's a question the public keeps asking while the governments are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere,"said the CDC. " The overall recommendation really is to avoid exposure."3 When that'S not possible,the guidelines say to consider wearing a simple surgical mask if you are in one of the three following situations.First,you're healthy and can't avoid going to a' crowded place.Second, you're sick and think you may have close contact with the healthy,such as a family member checking on you.Third,you live with someone who'S sick and thus might be in the early stages of infection,but still need to go out.4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou-- ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or mouth,you'ye been exposed.It's harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.7 Whether people should or should not use face masks still remains a question.The general public has to wait patiently for the results of the mask research scientists are still doing.Paragraph 5 _________.A:Reasons for Excluding Masks From the Self-protection ListB:Effort to Stop Flu From SpreadingC:When to Use Face MasksD:Guideline on Mask UseE:Warnings From the CDCF:Danger of Infection Through Germy Hands and Masks
考题
共用题干
Face Masks May Not Protect from Super-Fluif a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing.What is the passage mainly about?A: Widespread use of face masks.B: Possibility of a worldwide flu outbreak.C: New discoveries of a face mask research.D: Effectiveness of wearing face masks
考题
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Face Masks May Not Protect from Super-Fluif a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or harm during the next worldwide flu outbreak is a question that researchers are studying furiously.No results have come from their mask research yet. However,the government says peo-ple should consider wearing them certain situations anyway,just in case.But it's a question the public keeps asking while the government is making preparations for the next flu pandemic（大流行）.So the Centers for Disease Control and Prevention(CDC)came up with preliminary guidelines."We don't want people wearing them everywhere,"said the CDC."The overall recommendation really is to avoid exposure."When that is not possible,the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First,you're healthy and can't avoid going to a crowded place. Second,you're sick and think you may have close contact with the healthy, such as a family member checking on you .Third,you live with someone who's sick and thus might be in the early stages of infection,but still need to go out.Influenza pandemics can strike when the easy-to-mutate（变异）flu virus shifts to a strain（菌株）that people never have experienced.Scientists cannot predict when the next pandemic will ar- rive,although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false sense of security.Perhaps someone who should have stayed home would don（戴）an ill-fit-ting mask and hop on the subway instead.Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. if you touch that spot next and then put germy hands on your nose or mouth,you've been exposed. It's harder to rub your nose while wearing a mask,so your face may get pretty sweaty under masks. You reach under to wipe that sweat,and may transfer germs caught on the outside of the mask straight to the nose.These are the problems face masks may create for their users.Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing. One of the concerns the CDC has is thatA: masks may give people a wrong assumption of being safeB: the sick may not wear masks and go outC: flu virus may spread via public transportationD: healthy people may not know how to protect themselves
考题
资料：Faces, like fingerprints, are unique. Did you ever wonder how it possible for us to recognize people? Even a skilled writer probably could not describe all the features that make one face different from another. Yet a very young child or even an animal, such as a pingeon can learm to recognize faces. We all take this ability for granted.
We also tell people apart by how they behave. When we talk about someone’s personality, we mean the ways in which he or she acts, speaks, thinks and feels that make that individual different from others.
Like the human face human personality is very complex. But describing someone’s peronality in words is somewhat easier than describing his face. If you were asked to describe what a nice face looked like, you probably would have a difficult time doing so. But if you were asked to describe a nice person, you might begin to think about someone who was kind, considerate friendly, warm, and so forth.
There are many words to describe how a person thinks, feels and acts. Gordon Allports, an American psychologist, found nearly18,000 English words characterizing differences in people’s behavior. And many of us use this information as a basis for describing or typing, his personality. Bookworms, conservatives, military types——people are described with such terms.
People have always tried to type each other. Actors in early Greek drama wore masks to show the audience whether they played the villain’s or the hero’s role. In fact, the words person and persoality come from the Latin persona, meaning mask. Today, most television and movie actors do not wear masks. But we can easily tell the good guys from the bad guys because the two types differ in appearance as well as in actions.
Which of the following is NOT true?A.People differ from each in appearance
B.Different people may have different personalities
C.People can learn to recognize faces
D.People can describe all the features of others
考题
单选题Gas masks（）.A
should be worn while fighting a fireB
can be used in atmosphere deficient in oxygenC
filter contaminants from air that is to be breathedD
may be substituted for a self-contained breathing apparatus
考题
单选题When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.A
gogglesB
ear plugsC
soft-soled bootsD
fireman's outfit
考题
单选题Dunnage may be used to protect a cargo from loss or damage by（）.A
ship's sweatB
inherent viceC
taintingD
hygroscopic absorption
考题
单选题On all vessels equipped with refrigeration units of over 20 cubic foot capacity, （）.A
a gas mask suitable for protection against each refrigerant used, or a self contained breathing apparatus must be providedB
it is the sole responsibility of the chief engineer to ascertain that all members of the engineering department are familiar with the use of gas masks or breathing apparatusC
spare charges shall be carried for at least 50% of each size and variety of gas masks and/or self contained breathing apparatusD
all of the above
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