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【单选题】
在机床夹具的偏心轮夹紧机构中,偏心轮的偏心量取决于( )。A.
自锁条件
B.
夹紧力大小
C.
工作行程和工作范围
D.
手柄长度
手机使用
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反馈参考答案：
举一反三
【简答题】一块单晶硅,其电阻率ρ=1000ΩNaN,加上电压后能否构成一个探测器?一块绝缘体呢?说明理由。
【简答题】HXD3电力机车制动控制司机控制器调速手柄为( )级,级间能平滑调节。
【简答题】HXD3电力机车司机控制器调速手柄制动区为( )级,级间能平滑调节。
【简答题】先生は学生( )厳しい人だった。
【单选题】Why did the author begin to doubt himself after the first year of his writing career?
A.
He wasn't able to produce a single book.
B.
He hadn't seen a change for the better.
C.
He wasn't able to have a rest for a whole year.
D.
He thought that he lacked imagination.
【单选题】Why did the author begin to doubt himself after the first year of his writing career?
A.
He wasn't able to produce a single book.
B.
He hadn't seen a change for little barter.
C.
He wasn't able to have a rest for a whole year.
D.
He found his dream would never come true.
【单选题】Why did the writer begin this passage with a question?
A.
Because he wanted to catch the reader's attention.
B.
Because he wanted to have the readers guess the answer before reading.
C.
Because he wanted to sum up (概括) the topic of the passage.
D.
Because he wanted to make the reader understand him better.
【单选题】Why did he begin taking exercises?
A.
Because he planned to improve his health.
B.
Because he chiefly wanted to relax himself.
C.
Because he tried to reduce his body weight.
D.
Because he mainly wanted to build up his body.
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