<p>计算二重积分<img src="https://learnfile.20230611.cn/learnAppQuestion/60/a7/60a73a5ff43b36a978b50944e46e8c57.jpg" style="width: 100%;height: auto;">其中区域<img src="https://learnfile.20230611.cn/learnAppQuestion/24/08/240858adac5d8c815d74bd1a106f3b18.jpg" s