解决刨齿机摇台自上向下抖动现象，用调节螺钉调整扇形蜗轮副齿侧

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问题单项选择题

解决刨齿机摇台自上向下抖动现象，用调节螺钉调整扇形蜗轮副齿侧间隙，最小为（）。

A、0.01～0.015mm

B、0.1～0.15mm

C、0.03～0.05mm

D、0.001～0.005mm

答案

参考答案：A

补全对话，情景问答

根据语境，用恰当的句子完成对话。

A: Good morning, Mary.

B: Good morning, Helen. Come in, please.

A: Thank you. Your room is very nice. Oh! A bookshelf and many

books. 1______

B: Thank you. I like reading, you know. I think reading can make a

person wise.

A: Did you do well in the English exam?

B: Yes. I just learned I passed the English exam and the result is good.

I have got an "A".

A: 2______

B: Thank you. 3______ Why?

A: We will have a math exam next Monday. I'm afraid I may fail the

exam. So I've come for some help.

B: Don't worry. 4______

A: That's great. Thank you very much.

B: 5______ A friend in need is a friend indeed.

A: That's true. When shall we start?

B: Right now.

单项选择题

下列不属于虚拟专用网的交换技术是（）

A.端口交换

B.包交换

C.帧交换

D.信元交换