滑动轴承产生振动的原因主要是（）A、间隙过小B、间隙过大C、油_爱下问搜题

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问题单项选择题

滑动轴承产生振动的原因主要是（）

A、间隙过小

B、间隙过大

C、油品牌号不对

D、油膜振荡

答案

参考答案：D

单项选择题

Questions 24-30

·Look at the questions for this part.
·You will hear a passage about some types of advertising.
·For questions 24-30, indicate which of the alternatives A, B, or C is the most appropriate response.
·Mark one letter A, B or C on the Answer Sheet.

The challenge to Internet advertisers is to create ads that are ______.

A．quick to update

B．pleasant to look at

C．easy to remember

填空题

减小咬入角的方法有减小压下量和（）两种方法。