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当解决一个问题毫无头绪的时候,不妨回归本源.这是侦探类电视中著名的“back to basic”定律.笔者一直认为做数学题犹如破案,一个题目就是一个case,解题的关键就是
This is the famous “back to basic” law in detective television. I always think that doing math problems is like solving a case, a problem is a case and the key to solving the problem That’s it