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有不少电功率计算题,如果解法不当,不仅解题过程繁且易出错;若方法得当,则求解过程既迅速又准确。现举几例说明之。
There are many electric power calculation problems. If the solution is improper, not only the problem solving process is tedious and error-prone; if the method is proper, the solution process is rapid and accurate. Here are a few examples to illustrate it.