采用可能偏差Ep来评价分选效果时，当入料的可选性的波动不大时它

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问题多项选择题

采用可能偏差Ep来评价分选效果时，当入料的可选性的波动不大时它与（）有关。

A.分选设备的技术性能

B.操作状况

C.原料的粒度组成

D.原料的可选性

答案

参考答案：A, B, C

填空题

根据首字母或汉语提示填空。

1．Many students find it very difficult to m English words.

2．Lucy can write English very well, but she must pay attention to her p and try to speak it better.

3．Just now I r that I had left my schoolbag on the playground.

4．This exam is a real c . Please study hard for it.

5．Although I failed four times, my father encouraged me to have a f try.

6．In my d life, reading newspapers has become a part of mine.

7．He used to be a "problem child", but recent c changed his life.

8．Our teacher listed three p on how to write a good essay.

9．Luckily, she has an o to make an advanced study in Beijing.

10．Most children can not c on one thing for a long time.

填空题

摩擦桩的入土深度以控制（）为主，以控制（）为参考。