单项选择题

Word stress is the framework upon which sentence stress and intonation contour is built.
A、正确
B、错误

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带上雨伞以防下雨。

答案：正确答案：Take an umbrella with you in case of rain.

单项选择题

数据传送完成后，通道不需要向CPU发I/O中断请求。

A．对
B．错