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解答物理题目要完善、合理.有很多题目的答案表面上看起来非常合乎题意.可实际却是错误的.请看下题.例题有一电炉丝上标有“220V 1000W”的字样,现要接到110V
Solve the physical problem to be perfect and reasonable. There are a lot of questions that seem to answer very well on the surface. Actually it is wrong. Please see the next question. The example has an electric wire labeled “220V 1000W” and is now receiving 110V.