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【案例】学习“圆柱和圆锥”单元,某次家庭作业中出现了这样一题:把一张铁皮按下图剪开,正好能焊接成一只铁皮油桶,求所焊接成的油桶的体积。
Case study “cylinder and cone ” unit, a homework appeared in such a question: cut a sheet of metal according to the figure, just to be welded into a metal drum, the welding into the oil barrel volume of.