汽油机飞轮的转速是3000 r/min，则可知每分钟内一个汽缸里燃气推动活塞做功的次数是_刷题宝

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汽油机飞轮的转速是3000 r/min，则可知每分钟内一个汽缸里燃气推动活塞做功的次数是（）

A：1500次

B：3000次

C：6 000次

D：750次

上一题下一题 0.0难度选择题更新时间:2019-12-31 11:10:19

答案(点此获取答案解析）

A

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What is the best way to study? This is a very important question. Some Chinese students often1very hard for long hours. It is a2habit, but it is not a better way to study. An efficient(讲效率的) student must3enough sleep, enough food and enough rest. Every week you 4to go out for a walk or visit some friends or some nice places. It's good5your study. When you return to your studies, you'll find yourself6han before and you'll learn more.

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