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九十年代以来,四川中考试题在试卷最后部分的较难几何题目中,时常出现跟平行关系有关的题目.这类平行关系或直接出现于题目的条件中,或隐含于题目解题过程中、或是需证的结论.对于条件中给出平行关系,它的利用或挖掘对题目的解答有着至关重要的作用,对于结论需证平行关系,则需充分挖掘判定平行的条件.本文举例谈一谈这种特色.
Since the 1990s, the Sichuan middle school examination questions have often been related to parallel relations in the difficult geometrical topics in the last part of the examination paper. Such parallel relationships either appear directly in the conditions of the topic or are implicit in the problem solving process. , or the conclusion of the need for evidence. For the parallel relationship given in the condition, its use or mining has a crucial role in the solution of the problem. For the conclusion of the need to prove the parallel relationship, it is necessary to fully exploit the parallel conditions of the determination. Talk about this feature.