糖类、油脂、蛋白质是人类生存和发展的三大类营养物质。下列有关

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问题选择题

糖类、油脂、蛋白质是人类生存和发展的三大类营养物质。下列有关这三类物质的说法正确的是：

A．糖类是具有甜味的物质

B．油脂是热能最高的营养物质

C．糖类、油脂、蛋白质都属于高分子化合物

D．三类物质都能发生水解反应

答案

答案：B

句型转换

根据所给提示，完成句型转换。每空一词，含缩略词。

1. My father likes to watch basketball matches on TV. (改为否定句)

My father _______ _______ to watch basketball matches on TV.

2. I collect toys because they are beautiful. (对划线部分提问)

_______ _______ you collect toys?

3. Students can't take magazines out of the reading-room. (改为被动语态)

Magazines can't _______ _______ out of the reading-room by students.

4. Mike is 14 years old. David is 12 years old. (合并为一句)

Mike is 2 years _______ ________ David.

5. Alice didn't know how she could draw horses well. (改为同义句)

Alice didn't know how ________ _______ horses well.

6. I wondered what I should do next. (改为同义句)

I wondered what _______ ________ next.

选择题

如图所示，描述晶体熔化过程的曲线是：[ ]