更多"Proper lighting is a necessary for "的相关试题:
[单项选择]Proper lighting is a necessary for good eyesight even though human night vision can be temporarily impaired by extreme flashes of light.
A. needful
B. necessity
C. exigency
D. need
[填空题]Everyone wants to have good eyesight, and in many kinds of work it is very important to have good eyesight. The men who drive buses and (11) their planes must have excellent eyesight. People who make cameras and radios must (12) see very well, too. Many young children spoil their eyesight by reading in badly-lit places.
(13) and sleep are important for good eyesight: If you eat the wrong kinds of food or you do not have (14) , you will not have good eyesight. If your eyesight is not good, however, you should see an optician. An optician is a person who can test your eyesight and make (15) . Some girls would rather try to see without glasses than wear glasses. But it is very foolish to spoil your eyes in .this way.