下列属于球磨机四大工作指标的是（）。A.生产率 B.粒度合格率 _爱下问搜题

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问题多项选择题

下列属于球磨机四大工作指标的是（）。

A.生产率

B.粒度合格率

C.技术效率

D.介质充填率

答案

参考答案：A, B, C

填空题

短语辨析。
从方框里选择正确的短语，并用其正确的形式填空。

burn...to the ground, make one's way, glance through, vary from... to, make an effort, compare with, shoot at, be in a panic, be anx ious about, make an appointment

1. I had to start work, so I ____the morning paper.
2. In the game he _____ the basket 11 times but had only 5 succes ses.
3. Should I ____with you for the next two days?
4. Young people ____ to beautify our city.
5.____the past libraries, today's libraries are equipped much better.
6. The ages of the kids in the kindergarten_____2 years old ____6 years old.
7. The 1666 London fire____ many important buildings____.
8. Don't _____,boys;there's no danger.
9. I'm ____her safety.
10. My leg got hurt, but I____ home.

问答题简答题

标准误有什么作用？