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圆与我们的生活紧密相关,若运用好所学的有关圆的知识,便可以解决很多实际问题,下面举四例与同学共赏析.例1 现有一块破残的轮片,
The circle is closely related to our lives. If we use the knowledge we have learned about the circle, we can solve many practical problems. The following shows four examples of appreciation with classmates. Example 1 There is a broken wheel.