| 摘 要： | George Polya was a mathematician at Stanford University who was famous for his writing about solving problems. He once wrote:Solving problems is a practical skill like, let us say, swimming. We acquire any practical skill by imitation and practice. Trying to swim, you imitate what other people do with their hands and feet to keep their heads above water, and, finally, you learn to swim by practicing swimming. Trying to solving problem, you have to observe and to imitate what other people do when solving problems and, finally, you learn to do problems by doing them.
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