题目内容：
Traveling by train is slower than by plane, but it has its advantages.
参考答案：
答案解析：
选择题：Traveling by train is slower than by plane, but it has its advantages.
- 题目分类： 大学英语B级
- 题目类型：选择题
- 查看权限：VIP
Though this question is very difficult, if you keep on trying, you will find ...
Though this question is very difficult, if you keep on trying, you will find ...
We are from mainland China.
We are from mainland China.
We must take some measures to control the pollution.
We must take some measures to control the pollution.
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？