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  3. On March 18,1965, Leonov, the Russian astronaut, walked in outer space for the first time. Several months later, a similar feat

On March 18,1965, Leonov, the Russian astronaut, walked in outer space for the first time. Several months later, a similar feat

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问题     On March 18,1965, Leonov, the Russian astronaut, walked in outer space for the first time. Several months later, a similar feat was performed by the first American astronaut. Both of these space walkers had spent months previous to their flights learning how to control their movements under the strange conditions which exist in space. Wearing their thick space suits, they learned to deal with an environment where there is neither weight nor gravity, neither up nor down.
    We don’t realize how much we depend on the earth’s gravity until we are deprived of it. Then our feet no longer stay on the ground; we float around in the air, the slightest touch may send us drifting off in the opposite direction.
    In the laboratories where astronauts are trained for their journeys, they are subjected to conditions that resemble those of flight. It takes time for them to prepare for the great changes that occur in space. When the spaceship leaves the earth at tremendous speed, the astronauts feel as if they are being crushed against the spaceship floor. Later, when they leave the zone of the earth’s gravitation, they are unable to stay in one place. Simple actions, such as eating and drinking, become very difficult to perform. You may get an inkling of what the astronauts have to deal with if you try to drink a glass of water while standing on your head or while just lying down.
    Tremendous speeds must be attained to reach other planets in a reasonable time. If spaceships were launched from space, the absence of weight would permit the ships to be launched with great speed at reduced pressures. To illustrate this point, remember how strong the wind feels if we are traveling fast in a car, then imagine a car traveling through an area where there is no wind. The windless condition is comparable to the condition in outer space.
When the spaceship leaves the earth at tremendous speed, what does the astronauts feel?
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答案The astronauts feel great pressure
解析 细节题。答案在文章的第三段第3句话，意思是“当宇宙飞船以极快的速度升空，宇航员感觉就像重重地摔在了地上。”即they are being crushed against the spaceship floor，简短回答问题明确指出“不得照搬照抄原文”，所以分析出现这种状况的原因是pressure，所以得出答案。
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