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Warning: fclose() expects parameter 1 to be resource, bool given in /www/wwwroot/www.wendadaohang.com/inc/function.php on line 2475 求解一道曲面积分与高斯公式题目 答案是3/2*π 我的思路是补一个z=0的平面然后用高斯定理,但 - 33问答网