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问题 多项选择题

液体在内部相对运动时是存在摩擦阻力的，由于工作介质种类不同其内摩擦阻力差别很大，内摩擦阻力的大小将随油液的（）变化而差异很大。

A、种类

B、黏度

C、体积

答案

参考答案：A, B

单项选择题

Questions 14-23


·Look at the ten statements for this part.
·You will hear a short interview with George Jones, executive director for Bread for the City a private nonprofit organization.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Mark your answers on the Answer Sheet.

Hethen worked with the homeless for 7 years in downtown Los Angeles.

A．Right

B．Wrong

C．Not Mentioned
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问答题

德育工作中，怎样用好奖励和处分
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