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2020-01-17View Original

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本帖最后由 修泵的小曦曦 于 2020-1-18 23:43 编辑 76.正垂面截切球时,其截交线形状为()。?A、直线B、圆C、椭圆 昨天一题答案:A 74.活塞环不是一个整园环,而是呈开口状,在自由状态下的直径(A)气缸直径。A、大于B、等于C、小于 (次日公布前一天答案,公布前答对奖励10财富,公布后答对奖励5财富,参与奖励3财富)

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