首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
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 importa
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 importa
admin
2012-08-05
40
问题
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 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.
Having two eyes, instead of one, is particularly useful for ______.
选项
A、seeing at night
B、seeing objects far away
C、looking over a wide area
D、judging distances
答案
D
解析
此考题为细节题。根据文章第5段第1句Having two good eyes is important for judging distances,便可以肯定D正确。
转载请注明原文地址:https://kaotiyun.com/show/yIeC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
PeoplejokethatnooneinLosAngelesreads;everyonewatchesTV,rentsvideos,orgoestothemovies.Themostpopularreading
Billy,ahard-workingstudent,isfourteenyearsoldandintheninthgrade.Hehasapart-timejobthat【C1】______himupeverym
Tomowns______largercollectionof______booksthananyotherstudentinourclass.
Thetwostudentstalkedasifthey______friendsforyears.
Somepeoplegiveuptryingtolearnaforeignlanguage.Itcanseemtoomuchlikehardwork.Buttheproblemcomeswhentheygo
Hobbswasanorphan.Heworkedin-afactoryandeverydayhegotalittlemoney.Hardworkchangedhimthinandweak.Hewanted
Theseareusefultomaninthreeimportantways:Theyprovidehimwithwoodandotherproducts;Theygivehimshadeandtheyhel
Johnwokeupinthemiddleofthenightandsawsomethingwhite【21】hisgarden.Itseemed【22】towardsthehouse."That【23】ath
Itispossiblethattheweatheroftheworldmaybechanging.Somescientistsimaginethatthiscouldevenmeanthebeginningof
随机试题
泄殖腔是()
毛泽东首次提出新民主主义革命的总路线是在()
崩漏复旧的含义中重点调补的脏是()
在岩溶发育地表有覆盖的孤峰平原地区,铁路工程路线选线宜绕避下述()地质条件地段。
项目来源于人类有组织的活动的( )。
首层地面的组成不包括()。
旅行社业务经营许可证有效期为()年。
你在单位勤勤恳恳工作,但是领导总是给你安排一些吃力不讨好的工作。现在有一项去基层开展新项目的任务,领导派了别人,没有派你,不过你想跟领导争取。请把考官当成领导,进行现场模拟。
企业应该通过跨越现有竞争边界看市场以及将不同市场的买方价值元素筛选与重新排序,这种战略选择是指()。
Shortstoriesareduearevival.Inrecentyears,therehavebeencritically【C1】________collectionsbyAmericanwriterssuchas
最新回复
(
0
)