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【单选题】
按等加速等减速运动规律工作的凸轮机构,其位移曲线由( )组成。A.
倾斜曲线
B.
倾斜直线
C.
两条抛物线
D.
一条抛物线
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【单选题】The mention of the Soviet Union's much-boasted full employment is to
A.
support his viewpoint.
B.
refute the common view.
C.
prove its ineffectiveness.
D.
elicit the following text.
【单选题】How would the behavior of the asteroid differ from that described in Scientist2’s viewpoint if the asteroidhad not been flattened by the air pressure difference?The asteroid would:
A.
not have entered Earth’s atmosphere.
B.
have struck another planet in the solar system.
C.
have decelerated more gradually.
D.
have frozen.
【简答题】1 Match the following academic words with their definitions or synonyms. 1 antagonist a choice; option 2 protagonist b viewpoin ; stance 3 alternative c supporter 4 standpoint d be good, bad, importan...
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