<p>计算二重积分<img src="https://learnfile.20230611.cn/learnAppQuestion/87/48/874835fc2a3ed3b0662fd42dba8ede39.jpg" style="width: 100%;height: auto;"> ，其中 D是由直线<img src="https://learnfile.20230611.cn/learnAppQuestion/ca/4e/ca4e37d0453e77cc19ebc6b051a27ee2.