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例1甲、乙两台机器,功率之比为3:2,做功时间之比为1:4,求它们做功之比.分析因为题中已知甲、乙两台机器的功
Example 1 A, B two machines, the ratio of power is 3:2, the ratio of work done is 1:4, the ratio of their work done. Analysis because the problem is known for the two machines A, B work