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2011-09-20 18:20:00   来源：网络资源    双击单词自动翻译

作文地带导读：The formula for the volume of a cylinder is πr2(h). The question states that h = 5, but there is no value given for r. So in order to solve for the volume of the cylinder, we need to first find the value of r.　　The key step