This laser-doppler radar will be especially valuable in space because________.
A. the speeds of space vehicles will vary greatly
B. accurate measurements are essential in space
C. inaccuracies in measurement could cause accidents in space
D. all of the above
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All of the following are mentioned in the passage EXCEPT______.
A. the American Revolution was a revolt
B. Paul's friend signaled from a church
C. the British troops were sent to control the colonists
D. Paul's friend was serving in the British army
个体的主要满足来自于与口唇相关的性欲活动，这是指()。
A. 口唇期
B. 肛门期
C. 性器期
D. 潜伏期
E. 生殖期
It can be inferred from the passage that______.
A. the British colonies in America were very much aroused
B. the farmers and villagers were good at fighting their enemy
C. it was the first battle that Paul Revere had ever taken part in
D. Paul Revere had a strong sense of pride of being American
人类行为不是盲目的，它不但有起因而且指向特定的目标，这是指人类行为的()。
A. 可控性
B. 指向性
C. 动态性
D. 多样性
E. 适应性
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