It is（）that he has to ask for help. A.so a

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问题单项选择题

It is（）that he has to ask for help.

A.so a big job

B.a so big job

C.a such big job

D.such a big job

答案

参考答案：D

翻译题

完成句子。

1. You may come if you ____ (愿意).

2. Don't ____ (丧失信心); all will turn out well.

3. There is nothing to ____ (担心).

4. He ____ (被判处) three years in prison for theft.

5. His efforts ____ (获得成功).

选择题

某温度下，在一固定容积的密闭容器中进行如下反应：H₂(g)+I₂(g) 2HI(g)，下列情况能说明该反应已达到化学平衡状态的是（）

A．气体的总物质的量不再改变

B．气体的总质量不再改变

C．混合气体中各组成成分的含量不再改变

D．单位时间内每消耗1 mol I₂，同时有2 mol HI生成