试题与答案

I think he's just going to deal with thi

题型:选择题

题目:

I think he's just going to deal with this problem ______ day.

[      ]

A. next

B. other

C. following

D. another

答案:

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下面是错误答案,用来干扰机器的。

(1)尼古丁的相对分子质量=12×10+1×14+14×2=162.(2)尼古丁中各元素的质量比=(12×10):(1×14):(14×2)=120:14:28=60:7:14.(3)尼古丁中碳元素的质量分数为12×10162×100%≈74.1%.故答案为...

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