题目内容：
We must take some measures to control the pollution.
参考答案：
答案解析：
选择题：We must take some measures to control the pollution.
- 题目分类： 大学英语B级
- 题目类型：选择题
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What did they say they had done?
What did they say they had done?
何谓奈奎斯特速率和奈奎斯特带宽？此时的频带利用率有多大？
何谓奈奎斯特速率和奈奎斯特带宽？此时的频带利用率有多大？
What do you want for dinner?
What do you want for dinner?
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You'd better go quickly before I change my mind.
You'd better go quickly before I change my mind.