1、用铁丝做一个底面半径10厘米、高30厘米的圆柱形灯笼框架(侧面共用4根铁丝来连接上、下两个面).至少需要多少厘米?如果在灯笼侧面包一层红布,至少需要红布多少平方厘米?2、一条新
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![1、用铁丝做一个底面半径10厘米、高30厘米的圆柱形灯笼框架(侧面共用4根铁丝来连接上、下两个面).至少需要多少厘米?如果在灯笼侧面包一层红布,至少需要红布多少平方厘米?2、一条新](/uploads/image/z/10783156-4-6.jpg?t=1%E3%80%81%E7%94%A8%E9%93%81%E4%B8%9D%E5%81%9A%E4%B8%80%E4%B8%AA%E5%BA%95%E9%9D%A2%E5%8D%8A%E5%BE%8410%E5%8E%98%E7%B1%B3%E3%80%81%E9%AB%9830%E5%8E%98%E7%B1%B3%E7%9A%84%E5%9C%86%E6%9F%B1%E5%BD%A2%E7%81%AF%E7%AC%BC%E6%A1%86%E6%9E%B6%EF%BC%88%E4%BE%A7%E9%9D%A2%E5%85%B1%E7%94%A84%E6%A0%B9%E9%93%81%E4%B8%9D%E6%9D%A5%E8%BF%9E%E6%8E%A5%E4%B8%8A%E3%80%81%E4%B8%8B%E4%B8%A4%E4%B8%AA%E9%9D%A2%EF%BC%89.%E8%87%B3%E5%B0%91%E9%9C%80%E8%A6%81%E5%A4%9A%E5%B0%91%E5%8E%98%E7%B1%B3%3F%E5%A6%82%E6%9E%9C%E5%9C%A8%E7%81%AF%E7%AC%BC%E4%BE%A7%E9%9D%A2%E5%8C%85%E4%B8%80%E5%B1%82%E7%BA%A2%E5%B8%83%2C%E8%87%B3%E5%B0%91%E9%9C%80%E8%A6%81%E7%BA%A2%E5%B8%83%E5%A4%9A%E5%B0%91%E5%B9%B3%E6%96%B9%E5%8E%98%E7%B1%B3%3F2%E3%80%81%E4%B8%80%E6%9D%A1%E6%96%B0)
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