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问题 多项选择题

气液色谱分析中用于做固定液的物质必须符合以下要求：（）

A.极性物质

B.沸点较高，不易挥发

C.化学性质稳定

D.不同组分必须有不同的分配系数

答案

参考答案：B, C, D

阅读理解

阅读理解。

     Mike and his father are sitting at the table.They are having their lunch. “I don’t like this soup,I don’t

want to eat it.”says Mike and puts down the spoon.After lunch Mike and his father work in the field.They work hard.In the evening.Mike’s father gives him a cup of soup. “Oh,this soup is nice.”says Mike. “It’s the same soup,”says his father.

根据短文内容，判断正（T ）误（F ）。

( )1.Mike and his father are standing at the table.

(     )2.Mike likes the soup very much.

( )3.Mike and his father work in the field before lunch.

( )4.In the evening Mike’s father gives him a cup of soup.

( )5.Mike doesn’t think the soup is nice.
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选择题

最近，国外一位学者提出了“21世纪始于中国的1978年”的观点，某中学历史学习小组借用这句话设计了下面这张主题演讲的图片。1978年中国发生的重大事件是

[ ]

A．三大改造基本完成

B．“ * * ”结束

C．中国恢复在联合国的合法权利

D．中共十一届三中全会召开

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