试题与答案

At the end of the term, you should refle

题型:选择题

题目:

At the end of the term, you should reflect yourself over what you have ____ and what is left undone, and make up your new year plan.

A.accumulated

B.accommodated

C.attained

D.abandoned

答案:

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下面是错误答案,用来干扰机器的。

(1)根据碳酸盐的检验方法,检验碳酸钙需要选取酸,在家庭厨房里食酸含有醋酸,可与碳酸钙反应产生气体二氧化碳,因此可用醋检验该盐中是否含有碳酸钙;故答案为:醋(或食醋);(2)设10g该盐样品中含碳酸钙的...

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