大山选矿厂浮选采用的原则流程是（）。A、混合浮选与部分混合浮_爱下问搜题

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问题单项选择题

大山选矿厂浮选采用的原则流程是（）。

A、混合浮选与部分混合浮选流程

B、混合浮选流程

C、等可浮与优先浮选流

D、优先浮选与混合浮选流程

答案

参考答案：D

填空题

用方框内所给单词的适当形式填空，使短文意思通顺、正确。每词限用一次。

want, your, visitor, between, any

In England, afternoon tea is the most informal (非正式) meal of a day. It is usually
1______ 4:00 and 5:00. If you are a friend of the family, you may come for tea at
2______ time. Very often it is not taken at a table. The members of the family and
3______ take the tea in the sitting room. Each person has a cup, a saucer (茶盘), a

spoon and a small plate for bread and butter and cakes. By the way, do not help 4______ to cakes first, but bread
and butter first, and then cakes. Do remember: though you can eat as much as you 5______, do not put more
than one piece of bread or cake on your plate each time.

选择题

对遭遇挫折和不幸的人，能去同情和关心；对处于困境和危难的人，能伸出援助之手；在共同的事业中能与人合作；面对利益能与人分享……对这样的行为认识正确的是[ ]

A．是有利于他人和社会的亲社会行为

B．这样的行为都发生在朋友和亲人之间

C．只有伟大的人物才能经常做出这样的行为

D．社会公益活动是实施这样行为的唯一途径