题目内容

调速阀的调速稳定性比节流阀高

A. 对
B. 错

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容积调速回路的效率比节流调速回路高

A. 对
B. 错

调速回路包括哪些

The teacher wants the students to ...

A. take notes after she has finished speaking.
B. take notes while she is speaking.
C. forget about taking notes.

The teacher suggests eating ...

A. sugary snacks.
B. only apples.
C. fruit and cereals.

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