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一、淘汰法:这是根据选择支中有且仅有一个是正确的这个唯一性原则,淘汰错误的选择支,从而确定最后一个选择支必然正确.淘汰法的核心是如何否定错误的选择支.
First, the elimination method: This is based on the unique principle that the branch has one and only one is correct, and eliminates the wrong branch, so as to determine that the last branch is correct. The core of the elimination law is how to deny the wrong branch. .