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When we see well, we do not think about ...

When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.

People who are near-sighted can only see things that are very close to their eyes, and everything else seems blurry (=unclear). Many people who do a lot of work, such as writing, reading and sewing become near-sighted.

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. To prove this to yourself, look at an 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.

1.When things far away seem indistinct(模糊不清) , one is probably____.

A. near-sighted     B. far-sighted

C. astigmatic       D. suffering from cataracts

2.The underlined word suffer in the third paragraph probably means_____.

A. experience    B. imagine

C. feel pain        D. are affected with

3. 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

4.People who suffer from astigmatism have______.

A. one eye bigger than the other

B. eyes that are not exactly the right shape

C. a difficulty that can be corrected by an operation

D. an eye difficulty that cannot be corrected by glasses

 

1.A 2.D 3.D 4.B 【解析】 试题分析: 文章主要讲述了保护眼睛的重要性。人们往往在视力好的时候忽视对眼睛的保护,正确的做法应该是,无论视力的好与坏,都要注意保护眼睛 1.A 考查细节理解题。根据第二段“People who are near-sighted can only see things that are very close to their eyes.”可知,近视的人,只能看清近处的东西,而不能看清远处的,故选A项。 2.D 考查推理判断题。根据第三段提到People who are far-sighted suffer from just the opposite problem那些远视的人遭受相反的问题,故选D项。 3.D 考查细节理解题。根据最后一段“Having two good eyes is important for judging distances...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.”可知,拥有两只眼睛能帮助人们更好地辨别距离,故选D项。 4.B 考查细节理解题。根据第四段“Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism(散光).”可知,患有散光的人,他们的眼睛形状不正常,故选B。 考点:健康类短文阅读
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