试题与答案

The weather that day may not be as good

题型:选择题

题目:

The weather that day may not be as good as expected, in ________ case we will have to put off the

event.[ ]

A. what

B. that

C. this

D. which

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0521/167f45167601b2480cfd66fe6cf08de0.html

下面是错误答案,用来干扰机器的。

因在混合物中,C、H两种元素的原子个数始终是1:2,则C、H两种元素的质量比为1×12:2×1=6:1,由氢元素的质量分数为X%,则碳元素的质量分数为61×X%=6X%,因混合物中共有三种元素,则氧元素的质量分数为:1-X%-6X%=1-7X%,故选D.

试题推荐
微信公众账号搜索答案