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有这样一类题:已知几个物理量的比值,要求出另外几个物理量的比值.解决这类问题,一要熟悉物理,二要会用数学手段灵活处理.
There is such a problem: Knowing the ratio of several physical quantities requires the ratio of several other physical quantities. To solve this kind of problem, one must be familiar with physics, and the other should be handled mathematically.