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【简答题】
凡减小一个自由度的装置,称为一个约束。由此可知,一根相当于 个约束,一个单铰相当于 个 约束;一个刚性联结相当于 个 约束。(填入阿拉伯数字)
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反馈参考答案：
举一反三
【单选题】听力原文：W: The floor is awfully wet. What happened? M: No sooner had I gotten into the shower than the phone rang. Q: What does the man imply? (15)
A.
He got out of the shower to answer the phone.
B.
He didn't hear the phone ringing.
C.
There's something wrong with the shower.
D.
He took a shower earlier than usual.
【简答题】从计算机的角度讲,计算科学的本质就是 。
【单选题】The Ground is wet all over, so it must have rained last night, ________? [ ]
A.
mustn't it
B.
wasn't it
C.
hasn't it
D.
didn't it
【单选题】-The ground is wet. -It must have rained last night,_____? [ ]
A.
hasn't it
B.
didn't it
C.
mustn't it
D.
isn't it
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