题目内容

液相色谱柱安装时柱箭头方向要与流动相的流向一致。

A. 对
B. 错

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液相色谱的流动相可直接使用分析纯试剂。

A. 对
B. 错

Turn the following sentences into English, using as many of the words and phrases you have learned from the text as possible:1. 史密斯太太对我抱怨说，她经常发现与自己十六岁的女儿简直无法沟通。

Turn the following sentences into English, using as many of the words and phrases you have learned from the text as possible:2. 我坚信，阅读简写的（simplified）英文小说是扩大我们词汇量的一种轻松愉快的方法。

Turn the following sentences into English, using as many of the words and phrases you have learned from the text as possible:除了每周写作文外，我们的英语老师还给我们布置了八本书在暑假里阅读。