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有些物理题,特别是一些竞赛试题,若用常规的思路去解答,将会使问题变得很复杂,使思维进入死胡同.这时如能转换思维模式,用另外
Some physics questions, especially some contest questions, will be complicated if they are answered with regular ideas. This will cause the thinking to enter a blind alley. At this time, if you can change the mode of thinking, use another