题目内容

When Henry reached the bedroom his wife wasWhen Henry reached the bedroom his wife was __________in bed reading a bookand eating _.

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After Henry had got into bed he hearda____________________________.

Henry's wife reminded him that he should have shut the _________________.

由K个构件汇交而成的复合铰链应具有()个转动副。

A. K-1
B. K
C. K+1
D. 1

当机构的自由度数F大于原动件数目时,机构()。

A. 具有确定运动
B. 运动不确定
C. 构件被破坏