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问题 单项选择题

长期只食用一种食物，会出现蛋白质营养不良，其原因是（）。

A、缺乏糖类和脂类

B、缺乏必需氨基酸

C、缺乏动物性蛋白质

D、缺乏各种氨基酸

答案

参考答案：B

单项选择题

在厨房操作间、锅炉房中，液体或可熔化固体物质火灾、气体火灾单位灭火级别最大保护面积为（）。

A.0.5m2/B

B.1.0m2/B

C.50m2/A

D.75m2/A
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补全对话，情景问答
从方框中选择最佳选项完成对话，有两项多余。
A. I like playing computer games.
B. Do you play computer games?
C. How do you do your homework on it?
D. They check my homework.
E. But I often chat with them at the weekend.
F. Yes, I do.
G. What games do you play?

Mike: Lucy, do you have a computer?
Lucy: __1__
Mike: What do you often do on it?
Lucy: I often visit websites and get some information for my homework.
Mike: __2__
Lucy: No, never. I think playing games wastes(浪费) too much time. What about you, Mike? Do you have a computer?
Mike: Yes. __3__ I think it's very interesting.
Lucy: Oh, I usually send emails to my teachers. __4__
Mike: Do you chat (聊天) with your friends on the Internet?
Lucy: Yes. __5__
1. _____  2. _____  3. _____  4. _____  5. _____
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