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单选题
Hearing a strong noise, （） at once.
A
the engine stopped
B
the engine was stopped
C
he stopped the engine
D
he had stopped the engine
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____________, they immediately left the house.A、Being heard the noiseB、Hearing the noiseC、They heard the noiseD、They were hearing the noise
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You are the Cisco Network Designer in Cisco.com. Which signal and noise values will result in the best phone communication with an access point?()
A. signal strength 5dBmB. signal strength 6dBmC. noise level 4dBmD. noise level 5dBm
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There was so much noise that the speaker couldn‘t make himself ________. A. hear B. heard C. hearing D. to hear
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Can Loud Music Cause Hearing Impairment（损伤）?Have you ever gone to a concert and realized that your seats were right next to thebooming speakers?Are you guilty_________(1)turning up the volume on your portablecassette or CD player to drown out the whining（哭哭啼啼）of your little brother? Sometimes it's difficult to avoid loud music or noises,but they can be bad news because loud noises can_________(2)temporary or permanent hearing loss.Extremely loud music and noises that go on for long periods of_______(3)are common causes of deafness.If a noise is so loud that you have to shout to make yourself_______(4),there is a______(5)that the mechanism inside your ear can beinjured.Temporary hearing loss can happen after you've been_______(6)to loud noise for only 15 minutes.If you have temporary hearing loss,you won't be able to hear as________ (7) as you normally can, and you may have tinnitus（耳鸣）,which is afancy word for ringing in the ears. Your ears can feel"full",too._________（8),these things usually go away and your hearing soon returns to normal.Permanent hearing loss can happen when someone is exposed to loud noise ________(9)and over. Construction workers and people who work in factories must ________(10)ear protectors because the equipment they use can be extremely loud. But even some lawn mowers（割草机）and power tools can permanently__________ (11)a person's ability to hear high-pitched noises and can also give him permanent tinnitus. Listening to extremely loud music over and over can also have the same effect on a person's ______(12).And using headphones on a portable cassette or CD player can be dangerous________(13)if the volume is too high and the headphones are used a lot, the noise can damage the ears.The best way to avoid hearing loss is to wear ear protectors when working with machinery and earplugs when going to a_________(14).Headphones are OK to wear when you're listening to music;just be sure the volume isn't too high,and give them a rest________(15)once in a while._________(8.)A: Unfortunately B: Accordingly C: Luckily D: Unexpectedly
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共用题干
第三篇Deaf and Hearing LossPeople who begin to go deaf in adult life have different problems from those who are born deaf. They have to learn different ways of behaving and different ways of communication一perhaps at a time when learn- ing is not all that easy.A hearing aid is not a complete solution to the problem.The sound perceived by the deaf person through a hearing aid is distorted and appears to have more background noise than is heard by someone with normal hearing. Deafened people have to lipread as well.Lip reading is difficult,demands intense concentration,and an uninterrupted direct view of the speaker's face.No other activities can take place at the same time:the lip reader has to stop eating,stop everything in order to concentrate on hearing. It is not a question of stupidity or bad temper一as it sometimes appears to be一but a question of being very easy to misunderstand when the sound is distorted.Remember what it's like trying to communicate on a very bad telephone line.Frustrating,isn't it?The deaf have to face all the time.A useful way of looking at the problem is to see the deaf person as a foreigner一to treat them as if you were in a foreign country.You would speak more clearly,slowly and raise your voice slightly.And you'd use gestures to make your meaning clear, as well as have no hesitation in using pencil and paper to be abso- lutely certain.You can do all those things with the deaf一as well as making sure you don't obscure your mouth with your hand,a pipe or a cigarette.Another point quite often overlooked is that a hearing aid may be quite efficient and useful in a quite carpeted room一but try it in the high street in the rush hour,in a noisy car,in a railway station ticket office, a cinema or a concert hail and you've got a really difficult problem to distinguish speech.So don't suggest to or encourage deaf people to go to functions which are going to make their disability appear worse一and in- crease their sense of failure.On the other hand careful selection of cinemas with good sound systems is important and you should experiment to find out where the best seats are for hearing,fitting adaptors for radio and television,observing which friends are easier to understand,and making sure that people talking are well-lit and all useful andpositive activities.A person who loses hearing________.A:can hear well with the help of a hearing aidB:can communicate with others by lip reading and at the same time with the help of a hearing aidC:can only communicate with others with the help of pencil and paperD:can communicate easily with others by lip reading
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Can Loud Music Cause Hearing Impairment（损伤）?Have you ever gone to a concert and realized that your seats were right next to thebooming speakers?Are you guilty_________(1)turning up the volume on your portablecassette or CD player to drown out the whining（哭哭啼啼）of your little brother? Sometimes it's difficult to avoid loud music or noises,but they can be bad news because loud noises can_________(2)temporary or permanent hearing loss.Extremely loud music and noises that go on for long periods of_______(3)are common causes of deafness.If a noise is so loud that you have to shout to make yourself_______(4),there is a______(5)that the mechanism inside your ear can beinjured.Temporary hearing loss can happen after you've been_______(6)to loud noise for only 15 minutes.If you have temporary hearing loss,you won't be able to hear as________ (7) as you normally can, and you may have tinnitus（耳鸣）,which is afancy word for ringing in the ears. Your ears can feel"full",too._________（8),these things usually go away and your hearing soon returns to normal.Permanent hearing loss can happen when someone is exposed to loud noise ________(9)and over. Construction workers and people who work in factories must ________(10)ear protectors because the equipment they use can be extremely loud. But even some lawn mowers（割草机）and power tools can permanently__________ (11)a person's ability to hear high-pitched noises and can also give him permanent tinnitus. Listening to extremely loud music over and over can also have the same effect on a person's ______(12).And using headphones on a portable cassette or CD player can be dangerous________(13)if the volume is too high and the headphones are used a lot, the noise can damage the ears.The best way to avoid hearing loss is to wear ear protectors when working with machinery and earplugs when going to a_________(14).Headphones are OK to wear when you're listening to music;just be sure the volume isn't too high,and give them a rest________(15)once in a while._________(12) A:scope B:attitude C:survey D:hearing
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共用题干
Just one hour's listening to an MP3 player can damage hearing,claim scientists.It causes temporary changes in hearing sensitivity which may lead to long-term harm,according to a new study.The findings show over -stimulation of hair cells within the ear occurs even at varying volume levels for short periods of time.The study of almost 60 young people carried out by researchers at Ghent University,Belgium,is published in the Archives of Otolaryngology -Head&Neck Surgery journal.It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing. In the latest study,21 people aged 19 to 28 years were exposed to pop and rock music using MP3 players at varying volumes for one hour. A second group of 28 men and women were a control group who were not exposed to MP3 music.Hearing tests were carried out before and after the exposure,which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group.Lead researcher Hannah Kempler said:Excessive noise exposure can lead to metabolic and mechanical effects resulting in alterations of the structural elements of the inner ear that contains auditory sensory cells or"hair cells".The European Commission has warned up to 10% of 30-year-old would have to wear a hearing device within the next decade because they listen to music too loudly through headphones.Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players,often for several hours a day at maximum volume.Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume.Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(dB)一although users may be able to individually override it at their own risk. A control group refers to people with limited exposure to MP3 player.A:Right B:Wrong C:Not mentioned
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Just one hour's listening to an MP3 player can damage hearing,claim scientists.It causes temporary changes in hearing sensitivity which may lead to long-term harm,according to a new study.The findings show over -stimulation of hair cells within the ear occurs even at varying volume levels for short periods of time.The study of almost 60 young people carried out by researchers at Ghent University,Belgium,is published in the Archives of Otolaryngology -Head&Neck Surgery journal.It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing. In the latest study,21 people aged 19 to 28 years were exposed to pop and rock music using MP3 players at varying volumes for one hour. A second group of 28 men and women were a control group who were not exposed to MP3 music.Hearing tests were carried out before and after the exposure,which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group.Lead researcher Hannah Kempler said:Excessive noise exposure can lead to metabolic and mechanical effects resulting in alterations of the structural elements of the inner ear that contains auditory sensory cells or"hair cells".The European Commission has warned up to 10% of 30-year-old would have to wear a hearing device within the next decade because they listen to music too loudly through headphones.Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players,often for several hours a day at maximum volume.Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume.Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(dB)一although users may be able to individually override it at their own risk. MP3 player can't damage hearing when one listens to MP3 music for only 60 minutes.A:Right B:Wrong C: Not mentioned
考题
Life gets noisier every day and very few people can free from noise of some sort or another.It doesn′t matter where you live--in the middle of a modem city,or a faraway village--the chances that you will be disturbed by jet aero planes,transistor radios,oil powered engines,etc.,are almost everywhere.We seem to be getting used to noise,too.Some people feel quite lonely without background music while they are working.
Scientific tests have shown that total silence can be very frightening experience for human beings.However,some people enjoy listening to pop music which is very loud,and this can do harm to their eardrums（耳鼓）.The noise level in some disco is far above the usual safety level for heavy industrial areas.
One recent report about noise and concentration（专心）suggested that although a lot of people say that any noise disturbs their concentration,what really affects their ability to concentrate is a change in the level of noise.It goes on to say that a background noise,which doesn′t change too much（music,for example）may even help people to concentrate.
Some people may have their hearing hurtA.while they are in complete silence
B.while they are dancing violently
C.while they are listening to pop music
D.while they are listening to soft music
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In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）A、the signal to noise of the current optical amplifierB、the signal to noise of the previous amplifier or sourceC、the signal to noise introduced by the optical multiplexerD、the accumulated noise to signal ratio of the optical channel
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在HTML中关于strong和B标记的区别是（）A、Strong和B都是粗体显示，但是strong有重点强调的意思B、Strong和b完全一样C、Strong和b完全不一样D、b标记和strong标记在HTML使用是不一样的
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以下html标签嵌套正确的是（）A、＜span＞＜b＞更多＜/b＞＜/span＞B、＜span＞＜strong＞更多＜/strong＞＜/span＞C、＜span＞＜strong＞更多＜/span＞＜/strong＞D、＜img＞＜/img＞
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If there is a fire in a hold, what should you do?（）A、Close the hatch, accesses and ventilators at once. Flood CO2 into hold.B、Open the hatch, accesses and ventilators at once. Flood CO2 into hold.C、Close the hatch, accesses and ventilators at once. Flood water into hold.D、Open the hatch, accesses and ventilators at once. Flood water into hold.
考题
On hearing a great noise, Mike looked forward through the window （）what happened outside the room．A、to seeingB、to seeC、seeingD、to have seen
考题
Which signal and noise values will result in the best phone communication with an access point？（）A、 Signal strength 0dBm， noise level 6dBmB、 Signal strength 8dBm， noise level 9dBmC、 Signal strength 4 dBm， noise level 4 dBmD、 Signal strength 6dBm， noise level 5 dBm
考题
Which signal and noise values will result in the best phone communication with an access point?（）A、signal strength 46dBm, noise level 95dBmB、signal strength 74dBm, noise level 94dBmC、signal strength 68dBm, noise level 79dBmD、signal strength 50dBm, noise level 56dBm
考题
You are the Cisco Network Designer in Cisco.com. Which signal and noise values will result in thebest phone communication with an access point？（）A、 signal strength 5dBmB、 signal strength 6dBmC、 noise level 4dBmD、 noise level 5dBm
考题
Which of the following is the MOST secure method to authenticate users?（）A、User ID, a strong password, and a fingerprint scannerB、User ID, a strong password, and a token based deviceC、User ID and two levels of strong password requirementsD、User ID, a strong password, and a smart card
考题
单选题On hearing a great noise, Mike looked forward through the window （）what happened outside the room．A
to seeingB
to seeC
seeingD
to have seen
考题
单选题In the statement of “a General Medical Council disciplinary hearing”, the synonym to the word “hearing” is.A
official inquiryB
listening caseC
auditD
audience
考题
单选题In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（）A
the signal to noise of the current optical amplifierB
the signal to noise of the previous amplifier or sourceC
the signal to noise introduced by the optical multiplexerD
the accumulated noise to signal ratio of the optical channel
考题
单选题In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）A
the signal to noise of the current optical amplifierB
the signal to noise of the previous amplifier or sourceC
the signal to noise introduced by the optical multiplexerD
the accumulated noise to signal ratio of the optical channel
考题
单选题It is very important for the strong man to know that whatever strong he is, he cannot be the strongest.A
ItB
forC
to knowD
whatever strong
考题
单选题Hearing a（）noise in the backyard, Pamela went there to have a look.A
crackingB
crackC
crackedD
cracker
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