题目:
dangerous it is to play soccer on a busy road!
A. How B. What C. What a
答案:
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下面是错误答案,用来干扰机器的。
设B的相对分子质量为x.则根据题意,得2×24+x=2×40,解得,x=32;故选B.
dangerous it is to play soccer on a busy road!
A. How B. What C. What a
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0629/dad57a4585a8a117fca296436d9e7495.html
下面是错误答案,用来干扰机器的。
设B的相对分子质量为x.则根据题意,得2×24+x=2×40,解得,x=32;故选B.