12.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.Everything else seems blurry (模糊的).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 (判断) 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 distances as people with two eyes.
53.We should take good care of our eyesC.
A.only when we can see well
B.only when we cannot see perfectly
C.even if we can see well
D.only when we realize how important our eyes are
54.According to the passage,aAis more likely to be nearsighted.
A.student
B.worker
C.guard
D.painter
55.People who suffer from astigmatism haveB.
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
56.Having two eyes instead of one is particularly useful forD.
A.seeing at night
B.seeing objects far away
C.looking over a wide area
D.judging distances.
分析 文章大意:这是一篇日常生活类阅读,短文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,使用眼睛不当,会得近视眼和远视眼.正确的做法应该是,无论视力的好与坏,都要注意保护眼睛.
解答 53.答案:C.推理判断题.根据文章第一段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.可知很多人看得见的时候不重视对眼睛的保护,只是到了眼睛出了问题的时候才意识到眼睛的重要性,那么C正确.即使我们能看见,我们也要照顾好我们的眼睛.
54.答案:A.推理判断题.根据第二段第三句Many people who do a lot of work,such as writing,reading and sewing become near-sighted许多做大量工作的人,如写作、阅读和缝纫都是近视眼.可知,"学生"要做很多作业,要写、读很多东西,因此更容易是近视眼,选A.
55.答案:B.根据第三段第一句Other people do not see clearly because their eyes are not exactly the right shape.They have what is called astigmatism.其他人看不清楚,因为他们的眼睛不是完全正确的形状,他们有所谓的散光.可知,散光是眼睛不是正确的形状.选B.
56.答案:D.推理判断题.根据文章最后两句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 distances as people with two eyes.可知两只眼睛对于判断距离很重要.因此选D.
点评 阅读题型,要注重句子与句子之间、段落与段落之间逻辑关系以及对篇章的整体理解.根据所给问题选择正确选项完成试题.