车削导程为L＝6mm的三线螺纹，如果用小滑板分度法分线，已知车床

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问题单项选择题

车削导程为L＝6mm的三线螺纹，如果用小滑板分度法分线，已知车床小滑板刻度每格为0.05mm，分线时小滑板应转过（）。

A.120格

B.40格

C.30格

D.60格

答案

参考答案：B

单项选择题

下列哪项为原发性肾病综合征的最常见并发症（）

A.血栓及栓塞

B.动脉粥样硬化

C.肾功能不全

D.感染

E.心绞痛、心肌梗死

选择题

-What do you think of the bottled water?

-I don't like it at all. It is reported that much nutrition, including some minerals, _____ while it is

being processed. [ ]

A. are ridded of

B. are gotten rid of

C. gets rid of

D. is ridded of