更多"It is only when we cannot see perfe"的相关试题:
[简答题]It is only when we cannot see perfectly that we realize how important our eyes are.
[填空题]We modem people eat not only when we are hungry but also when we are in bad mood.
[填空题]We modern people eat not only when we are hungry but also when we are in bad mood.
[填空题]Only when we have got sufficient information, ____________________ (我们才能做出正确的判断).
[填空题]It is only when you see that with your own eyes ______ (你才能完全明白他有多么爱你).
[填空题]People see him when they’re ill
[单项选择]Only when we had finished all the work（）that it was too late to take a bus home.
A. did we realize
B. will we realize
C. we did realize
D. we will realize
[填空题]Only when we have suffered a serious setback, __________ (我们才会去努力克服自己的自满情绪)
[填空题]Only when we had studied the data again ______ (我们才意识到真正的问题是什么).
[单项选择]When we can see well, we don’t think about our eyes very’ often. It is only when we cannot see perfectly that we come to see how important our eyes ale.
People who are nearsighted can only see things that are very close to their eyes. 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 things clearly.
People who are farsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty 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 don’t see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts (白内障). Long age these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
When night falls, colors become fain
A. Sometimes we can not see a thing because we look directly at it.
B. Sometimes we can not see a thing because we use the sides of eyes to see it.
C. The center of the eye is more sensitive than the sides of the eye after dark.
D. The center of the eye is as sensitive as the sides of the eye in daylight.
