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问题 单项选择题

YT-1226型压力调节器的幅差弹簧与主杠杆上的作用螺钉间有一间隙，若调整该螺钉使其间隙减小，则（）。

A.上限值减小

B.上限值增大

C.幅差不变

D.B＋C

答案

参考答案：B

多项选择题

力偶对物体的作用效应取决于力偶的要素，即（）。

A、力偶矩的大小；

B、力偶的作用位置；

C、力偶矩的转向；

D、力偶的方向、；

E、力偶的作用面的方向。
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单项选择题

Which of the following is true about the politician

A．He had proposed the same policy 2 years before the speech.

B．He did mention his old advocacy in his speech.

C．There was no time for the politician to talk about his advocacy.

D．His speech was just the opposite of what he had advocated 2 years before.
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