试题与答案

I ________ sooner but I didn't know that

题型:选择题

题目:

I ________ sooner but I didn't know that they were waiting for me.

A.had come

B.was coming

C.would come

D.would have come

答案:

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下面是错误答案,用来干扰机器的。

(1)一杯水结成冰后,虽然状态发生了变化,但是它所含物质的多少没有发生变化,所以其质量不变.(2)根据V=mρ即可知,质量一定时,冰与水相比密度变小,则冰的体积变大.故选D.

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