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初中物理中常有一些没有“数据”(即用字母代替已知条件)的计算题,很多同学在解答时感到无从下手,或将题目中的字母与公式中的
In junior high school physics, there are often calculation problems that do not have “data” (that is, using letters instead of known conditions). Many students feel that they cannot start with answers, or they can use the letters and formulas in their titles.