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【单选题】
两个构件组成移动副以后,约束情况是( )
A.
约束两个移动,剩余一个转动
B.
约束一个移动,一个转动,剩余一个移动
C.
约束三个运动
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参考答案:
举一反三
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【单选题】跆拳道一共有多少传统品势?
A.
17
B.
16
C.
15
D.
18
【简答题】One day Henry went to town to buy new clothes. First he tried on a pair of trousers. He didn't like the trousers, so he gave them back to the shopkeeper. Then he tried a robe which had the same price ...
【简答题】ABC Radio Jim Green is an announcer(播音员)for the program.Most of the girls___1____ boys like the program. They ___2___like Jim Green. Some of them often make phone calls to him and thank him ___3___ hi...
【单选题】Jim hesitated before getting in. He didn't like the man's【21】or the way he talked. And at other time he would have said,'【22】, 'but 'his leg hurt, and it was a long【23】home. He got【24】The big car star...
A.
clothes
B.
looks
C.
van
D.
motorcycle
【简答题】Last week I visited my friend Pete in the new home where he lives with his wife and daughter. Pete used to spend his holidays travelling the world, visiting the pyramids in Egypt or scuba diving(潜水) i...
【简答题】At 21, Ricardo Semler became boss of his father’s business in Brazil, Semco, which sold parts for ships. Semler Junior worked like a madman, from 7:30 a. m., until midnight every day. One afternoon, w...
【单选题】he like the new home ?
A.
Does
B.
Do
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