函数 ，x∈[0，π]的图象绕x轴旋转一周，得到一旋转体，该旋转体的体积为

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='13517' and id < 1098011 and id<>'1098011' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='13517' and id > 1098011 and id<>'1098011' order by id asc limit 5