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下列几种检查中，不产生电离辐射的是（） What does not produce ionizing radiation （)
A．乳腺钼靶X线摄影Mammography
B．PET
C．SPECT
D．MRI
参考答案和解析
MRI
更多 “下列几种检查中，不产生电离辐射的是（） What does not produce ionizing radiation （)A．乳腺钼靶X线摄影MammographyB．PETC．SPECTD．MRI” 相关考题
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The atoms of certain substance are excited in such a way () they produce coherent light.
A.whichB.whoC.thatD.what
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The EMPLOYEES table contains these columns:You need to write a query that will produce these results:1. Display the salary multiplied by the commission_pct.2. Exclude employees with a zero commission_pct.3. Display a zero for employees with a null commission value.Evaluate the SQL statement:What does the statement provide?（）A. All of the desired resultsB. Two of the desired resultsC. One of the desired resultsD. An error statement
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According to the Chemical Data Guide，what does ethyl chloride produce when ignited?A.Toxic fumes of oxides of nitrogenB.Toxic fumes of leadC.Poisonous phosgene gasD.Poisonous chlorine gas
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Which of the following may illustrate the difference between "competence" and__________ "performance"?
A．What a person "knows" and what he/she "does".
B．What a person "can do" and what he/she "does".
C．What a person "does" and what he/she "knows".
D．What a person "does" and what he/she "can do".
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Nuclear Power and Its DangerNuclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.Nuclear radiation has a certain mystery about it,partly because it cannot be detected by human senses.lt can't be seen or heard,or touched,or tasted,even though it may be all around us.There are other things like that.For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver.Similarly,we can't sense radioactivity without a radiation detector.But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital organs.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.If the radiation does not hit anything important,the damage may not be significant．This is the case when only a few cells are hit,and if they are killed outnght.Your body will replace the dead cells with healthy ones.But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce themselves in a deformed way.They can grow into cancer.Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation.Serious damage can be done without the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine,then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.Radiation can hurt us.We must know the truth.The underlined word"significant"in Paragraph 3 most probably means______.A:fatal B:meaningfulC:remarkableD:harmful
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第三篇 Nuclear Power and Its DangerNqclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.Nuclear radiation has a certain mystery about it,partly because it cannot be detected by human senses.It can't be seen or heard,or touched,or tasted,even though it may be all around us.There are other things like that.For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver.Similarly,we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital or-gans.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.if the radiation does not hit anything important,the damage may not be significant. This is the case when only a few cells are hit,and if they are killed outright.Your body will replace the dead cells with healthy ones. But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce them-selves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation.Serious damage can be done with-out the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine, then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as result of radiation absorbed by its grandparents.Radiation can hurt us.We must know the truth.Which of the following can be best inferred from the passage?A:The importance of protection from radiation cannot be over-emphasized.B:The mystery about radiation remains unsolved.C:Cancer is mnainly caused by radiation.D:Radiation can hurt those who are not aware of its danger.
考题
共用题干
第一篇Nuclear Power and Its DangerNuclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.Nuclear radiation has a certain mystery about it,partly because it cannot be detected by human senses.It can't be seen or heard,or touched or tasted,even though it may be all around us.There are other things like that. For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver. Similarly,we can't sense radioactivity without a radiation detector. But unlike common radio waves,nuclear radiation is not harmless to human beings and other living things.At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital organs.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.If the radiation does not hit anything important,the damage may not be significant. This is the case when only a few cells are hit,and if they are killed outright,your body will replace the dead cells with healthy ones.But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce themselves in a deformed way.They can grow into cancer. Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation.Serious damage can be done without the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine,then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as result of radiation absorbed by its grandparents.Radiation can hurt us.We must know the truth.According to the passage,the danger of nuclear power lies in________.A:nuclear mysteryB:radiation detectionC:nuclear radiationD:radiation level
考题
共用题干
Nuclear Power and Its DangerNuclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.Nuclear radiation has a certain mystery about it,partly because it cannot be detected by human senses.lt can't be seen or heard,or touched,or tasted,even though it may be all around us.There are other things like that.For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver.Similarly,we can't sense radioactivity without a radiation detector.But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital organs.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.If the radiation does not hit anything important,the damage may not be significant．This is the case when only a few cells are hit,and if they are killed outnght.Your body will replace the dead cells with healthy ones.But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce themselves in a deformed way.They can grow into cancer.Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation.Serious damage can be done without the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine,then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.Radiation can hurt us.We must know the truth.According to the passage,the danger of nuclear power lies in______.A:nuclear mysiery B:radiation detectionC:nuclear radiation D:radiation level
考题
共用题干
Nuclear Power and Its DangerNuclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.Nuclear radiation has a certain mystery about it,partly because it cannot be detected by human senses.lt can't be seen or heard,or touched,or tasted,even though it may be all around us.There are other things like that.For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver.Similarly,we can't sense radioactivity without a radiation detector.But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital organs.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.If the radiation does not hit anything important,the damage may not be significant．This is the case when only a few cells are hit,and if they are killed outnght.Your body will replace the dead cells with healthy ones.But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce themselves in a deformed way.They can grow into cancer.Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation.Serious damage can be done without the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine,then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.Radiation can hurt us.We must know the truth.Radiation1 can cause serious consequences even at the lowest level______.A:when it kills few cellsB:if it damages few cellsC:though the damaged cells can repair themselvesD:unless the damaged cells can reproduce themselves
考题
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第三篇Nuclear Power and Its DangerNuclear power's danger to health,safety,and even life itself can be summed up in one word:radia-tion.Nuclear radiation has a certain mystery about it,partly because it canhot be detected by human senses. It can't be seen or heard,or touched,or tasted,even though it may be all around us.There are other things like that.For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver. Similarly,we can't sense radioactivity without a radiation detector. But unlike common radio waves,nuclear radiation is not harmless to human beings and other living things.At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital organs.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.If the radiation does not hit anything important,the damage may not be significant. This is the case when only a few cells are hit,and if they are killed outright.Your body will replace the dead cells with healthy ones.But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.This is another reason for some of the mystery about nuclear radiation.Serious damage can be donewithout the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine,then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as result of radiation absorbed by its grandparents.Radiation can hurt us.We must know the truth.Which of the following can be best inferred from the passage?A:The importance of protection from radiation cannot be over-emphasized.B:The mystery about radiation remains unsolved.C:Cancer is mainly caused by radiation.D:Radiation can hurt those who are not aware of its danger.
考题
I just wonder( )that makes him so excited. A.why it does
B.what he does
C.how it is
D.what it is
考题
One of the main advantages of a graphite-furnace atomizer is that（）A、It requires only very small quantities of a sampleB、It requires metal.ions in aqueous solutionC、It does not produce background emission like a flameD、It does not get hot like a flame
考题
“吃水”这个词用英语怎么说？（）A、What does “chi shui” mean in English?B、What does “chi shui” stand for?C、What’s “chi shui” in English?
考题
单选题One of the main advantages of a graphite-furnace atomizer is that（）A
It requires only very small quantities of a sampleB
It requires metal.ions in aqueous solutionC
It does not produce background emission like a flameD
It does not get hot like a flame
考题
单选题What does the man’s company mainly produce?A
Medical equipment.B
Special machine.C
Medicine for hospitals.
考题
单选题In describing engine operation, what does the term “cycle” mean?（）A
The sequence of events that produce a power pulseB
One rotation of the engine crankshaftC
One stroke of a pistonD
All of the above
考题
单选题What does the writer say about the expansion of small businesses?A
Many small businesses do not produce enough profits to finance growth.B
Many employees in small businesses have problems working as part of a team.C
Being able to recruit the right people is the most important factor affecting growth.D
Leaders of small businesses lack the experience to make their companies a success.
考题
单选题According to the Chemical Data Guide，what does ethyl chloride produce when ignited?（）A
Toxic fumes of oxides of nitrogenB
Toxic fumes of leadC
Poisonous phosgene gasD
Poisonous chlorine gas
考题
单选题According to the writer, what does every business, regardless of its size, make effort to achieve nowadays?A
Get people to buy their products.B
Design and produce new products.C
Make their prices more competitive.D
Better the quality of their present products.
考题
填空题What kind of sound does the mouse produce?It produces ____ sounds.
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