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【单选题】
蜗杆的法向齿单独画出（）剖视，并标注尺寸及表现粗糙度。A.
旋转
B.
半
C.
局部移出
D.
全
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举一反三
【简答题】Those who spend more pre-bedtime hours using the Internet or watching television are more likely to report insufficient sleep, even though they sleep almost as long as people spending fewer pre-bedtim...
【单选题】Men are said to be more aggressive and enjoy taking risks for ______.
A.
biological reasons
B.
social reasons
C.
economic reasons
D.
reasons not mentioned in the passage
【简答题】A. some risks B. a lot less C. some notes D. a lot more
【单选题】Which of the following statements might Figner agree with?
A.
The more risks one experiences, the less dangerous he will feel.
B.
People can learn skills to avoid taking risks from the paper.
C.
The common belief that women take more risks than men is wrong.
D.
there is no apparent difference between the results from lab and real world.
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