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混凝土用石有什么质量要求？

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涵洞被洪水冲失时如何进行抢修？

简述可变电阻器式进气压力传感器的工作原理。

We’d better discuss everything _______ before we work out the plan.

A. in detail
B. in general
C. on purpose
D. on time

It sounds like something is wrong with the car ’s engine. , we ’d better take it to the garage immediately.（）

A. Otherwise
B. If not
C. But for that
D. If so