题目内容
（请给出正确答案）
Having two eyes, instead of one, is particularly useful for ______.
A. seeing at night
B. seeing objects far away
C. looking over a wide area
D. judging distances
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更多“Having two eyes, instead of on…”相关的问题
When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are.
People who are nearsighted can only see things that are very close to their eyes. Everything else seems blurry (模糊的). Many people who do a lot of close work, such as writing, reading and sewing, become nearsighted. Then they have to wear glasses in order to see distant objects clearly.
People who are farsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people olden became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself, look at object out of one eye; then look at the same object out of your other eye. You will find the object's relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
We should take good care of our eyes ______.
A．only when we can see well
B．only when we cannot see perfectly
C．even if we can see dell
D．only when we realize how important our eyes are
People who are near-sighted can only see things that are very close to their eyes.' Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them."
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out of the other eye. You will find the object's relation to the background (背景) and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
We should take good care of our eyes ______.
A．only when we cannot see perfectly
B．only when we can see well
C．even if we can see well
D．only when we realize how important our eyes are
After【23】for some time, they saw a farm house. When they【24】the house, they found a farmer and his wife having supper. They were asked to sit down and【25】too. As they were very hungry, they did so with【26】
While eating his supper the farmer kept his eyes on the plate without saying【27】. This made the travelers a little afraid. After supper the farmer's wife【28】them up to a store room, and showed them a【29】where they could sleep. Being【30】, they soon book off their clothes and went to bed. But the younger traveler was too【31】to go to sleep. He heard the farmer and his wife talking in the room in a【32】voice. At first he couldn't hear any words, but then he【33】heard the husband say, "Must we kill them both？" and the wife replied, "Yes, of course we must." A moment later, he again heard the farmer【34】into the room, so he quickly【35】behind the door. The door slowly【36】, and the farmer came in with a light in one hand and a long knife in the other. He went to the【37】hanging on the wall, cut off a piece, and returned as【38】as he had come. The two travelers didn't dare to go to【39】. Early in the morning they began to【40】in the dark through the kitchen, finding on the table a piece of meat cleaned and two chicks killed.
(61)
A．know
B．found
C．saw
D．heard
A.I swear that I only have eyes for you
B.I swear to have eyes only for you
C.1 swear only having eyes for you
D.I swear I only have eyes for you
A.It has a big nose and two big eyes
B.It has a big nose and two big ears
C.It has a big mouth and two big eyes
Having waited in the waiting room for two hours, he became ______.
A．patient
B．impatient
C．patience
D．impatience
A.Having worked
B.Working
C.Worked
D.Being worked
B. how to tell the differences between an executive and a visitor
C. how to tell businessmen at a glance
D. how businessmen indicate status
Which of the statements can best sum up the passage？A.The executive has a higher status than the visitor
B.Military people wear uniforms but the businessmen do not
C.A study revealing a set of rules about the status of businessmen
D.It is a good method to use a series of silent film in research
The longer the seated man was in answering the knock, __________ .A.the higher his status
B.the less it affected his status
C.the lower his status
D.the more it affected his status
Having entered the room, the closer the visitor approaches the executive, __________ .A.the less it affected his status
B.the lower his status
C.the more it affected his status
D.the higher his status
Which statement is NOT true？A.Soldiers wear uniforms with various symbols so that one can tell their status at a glance
B.In the experiment, one actor played the executive while the other played the seated man
C.Business people wear similar suits
D.The audience watching the film rated the executive and the visitor in terms of status
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