He thought himselfto his friends because his family was rich.

题干

He thought himself to his friends because his family was rich.

A：higher

B：better

C：richer

D：superior

上一题下一题 0.0难度选择题更新时间:2020-01-25 07:43:05

单缸四冲程汽油机的气缸活塞面积为30cm²，一个冲程活塞在气缸中移动的距离是50mm，满负荷工作时做功冲程燃气的平均压强为9.0×10⁵Pa，飞轮1min转动1800圈．当汽油机满负荷工作时（不计摩擦），求该汽油机的功率．

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