发布网友 发布时间:2024-10-23 20:58
共2个回答
热心网友 时间:2024-11-06 17:53
用周长公式0.5*3.14=1.57. 1.57*600*30=28260换算千米为28.260千米
热心网友 时间:2024-11-06 17:55
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