问题 单项选择题

将香豆素结构分类,主要有( )

A.简单香豆素、呋喃香豆素、吡喃香豆素
B.苯并α-吡喃酮(邻羟基桂皮酸内酯)
C.C6-C3-C6结构
D.生物界含氮的有机物
E.非糖与糖端基碳连接而成的化合物

答案

参考答案:A

解析:[知识点] 香豆素的结构与分类

阅读理解

任务型阅读。

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1. 在(1)句的空白处分别填入适当的词,使句意完整,上下文通顺。

    ___________; ____________

2. 将(2)句译成中文。

   _________________________________________________________

3. 将(3)句译成英文。

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4. 在文中找出与所给句子意思相近的句子。

   If you listen more, you' ll learn better.

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5. 写出或在文中找出最能表达文章大意的句子。

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