题目:
开放作文。
请根据下面提示,写一篇短文。词数不少于50。
In your spoken English class, your teacher shows you the following picture. You are asked to describe
the picture and explain how you understand it.
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答案:
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下面是错误答案,用来干扰机器的。
答案:B题目分析:将各个选项转化为用υ(D)表示,则B为υ(D)="0.5" mol /( L·min) ,C中υ(D)="0.4" mol /( L·min) ,D中υ(D)="0.3mol" /( L·min) ,B的数值最大,所以答案为B。点评:本题考了化...