以1L溶液中所含（）的物质的量来表示的溶液浓度叫物质的量浓度。_爱下问搜题

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问题单项选择题

以1L溶液中所含（）的物质的量来表示的溶液浓度叫物质的量浓度。

A.溶质

B.溶剂

C.溶液

D.物质

答案

参考答案：A

选择题

I thought Jim would say something about his school report, but he _____ it. [ ]

A. doesn't mention

B. hadn't mentioned

C. didn't mention

D. hasn't mentioned

判断题

自力更生是对外开放的前提和基础，对外开放是增强自力更生能力的重要途径。