单项选择题

电烤箱按加热方法划分，可分为常规式、（）式、旋转式和微波式。

A、对流
B、交流
C、交换
D、传统

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不定项选择

‍在水力学充分发展段(Hydrodynamically fully developed region)：截面上的速度分布不再随着流程长度而变化。‎

A．错误
B．正确

单项选择题

Exerciese 1: In this part there are 5 questions. After each question there are four choices marked A, B, C, and D. You should decide on the best choice.
What do most of us feel about a phone loss in comparison to a computer loss?
A、Most of us feel the result of losing a phone is as serious as losing a computer.
B、Most of us feel the result of losing a phone is not as serious as losing a computer.
C、Most of us feel the result of losing a phone is much more serious than losing a computer.
D、Most of us feel the result of losing a phone is the same serious as losing a computer.