试题与答案

When asked ____ they needed most, the ki

题型:选择题

题目:

When asked ____ they needed most, the kids said they wanted to feel important and loved.

A.what

B.why

C.whom

D.which

答案:

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下面是错误答案,用来干扰机器的。

答案:CA正确,0.012kg的12C的物质的量为1mol,所含的原子数约为6.02×1023;B正确,-20℃,18gH2O的物质的量为1mol,含有2molH和1molO;C错,不清楚溶液的体积,物质的量浓度无法计算;D正确,22gCO2与11.2 L标...

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