5.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 unclear.Many people who do a lot of work,such as writing,reading and sewing become near-sighted.
Then people who are far-sighted endurejust 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 then.
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 our 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.
61.We should take good care of our eyesD.
A.only when we can see well
B.only when we cannot see perfectly
C.only when we are near-sighted or far-sighted
D.even if we can see well or perfectly
62.When things far away seem unclear,one is probablyA.
A.near-sighted B.far-sighted C.astigmatic D.suffering from cataracts
63.The underlined word endurein the third paragraph probably meansD.
A.experience B.imagine C.suffer from D.recover from
64. 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
65.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 difficult that cannot be corrected by glasses.
分析 眼睛是心灵的窗户,我们应该保护好我们的眼睛.
解答 61.D 推理判断题.根据第一段"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,视力正常的时候,人们很少考虑到自己的眼睛,只有看不太清晰的时候,才意识到眼睛的重要性.作者暗含的意思是,呼吁读者平时多注意保护眼睛,即使是在视力正常的时候.故选D.
62.A 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.
63.C 猜测词义题.根据"Then people who are far-sighted endure just the opposite problem."可知,患有远视的人,忍受与近视正好相反的问题.A经历;B想象;C遭受;D从…中恢复,故选C.
64.D 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.
65.B 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.
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