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平面图形的折叠问题是近几年中考的热点.由于折叠图形时总会出现互相重合的部分,所以解答时一般先要比较折叠前后的图形,
The folding problem of plane graphics is a hot topic in recent years. Since the folded parts always appear to overlap each other, the answers are usually compared before and after folding.