职称英语 (12)
最新试题
He was banned from driving for six months.
05-09
I am heartily grateful to your help.
05-09
It seems highly unlikely that she will pass the exam.
05-09
My principal concern is to get the job done fast.
05-09
The frame needs to be strong enough to support the engine.
05-09
The ice is not thick enough to bear the weight of a tank.
05-09
He kept constant contact with his family while he was in Australia.
05-09
Dairy products may provoke allergic reactions in some people.
05-09
Cocktail is blended by many kinds of wines.
05-09
The book raised a storm of controversy.
05-09
热门试题
The old companies lose importance and some of them vanish altogether.
The two girls look alike.
Did she aewipt his research proposal?
She only needs a minute amount of money.
共用题干
VisionHuman vision like that of other primates（灵长目）has evolved in an arboreal（丛林）environment.______(46)In the course of evolution,members of the primate line have acquired large eyes while the nose has shrunk.______ (47) Of mammals（哺乳动物）only humans and some primates enjoy color vision.______(48)Horses live in a single-color world.Light visible to human eyes,however,occupies only a very narrow band in the whole electromagnetic spectrum（光谱）.Ultraviolet rays（紫外线）are invisible to humans though ants and honeybees are sensitive to them.______(49)The world would look terribly different if human eyes were、 sensitive to infrared radiation（红外线）.Then instead of the darkness of night,we would be able to move easily in a strange shadowless world.______(50)But human eyes excel in other ways. They are in fact remarkably discerning in color gradation. The color sensitivity of normal human vision is rarely surpassed even by complicated technical devices.
This gold mine was discovered by accident.
The boy ahead of me is my classmate.
Oniy a small minority of the mentally ill are liable to harm themselves or others.
There is a growing gap between the rich and the poor.
My younger sister is a fascinating girl.
