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【单选题】
作用在截面单位面积上的内力称为A.
应力
B.
内力
C.
外力
D.
应变
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【单选题】21ST CENTURY CONSUMER Here's a statistical snapshot of the American consumer: Median income, at ＄ 40,816 per household, is more princely than almost any nation's, and many of us have the stuff to show...
A.
fish
B.
cats
C.
birds
D.
dogs
【单选题】(Para. 2) Men were certainly found to be no more likely than women to discuss “important” or “highbrow” subjects such as politics, work, art and cultural matters – except (and this was a striking dif...
A.
They tend to talk about themselves.
B.
They change their tone of voice.
C.
They speak more about politics and art than usual.
D.
They let women do most of the speaking.
【简答题】You don’t really do anything with ____ , while hobbies are more active. Watching TV is the most popular form of home entertainment which _____ the most time(2.8 hours per day). Visiting friends or cha...
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