<p>将<img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/b9/5f/b95ff345d2eb9b30987f817d5d74235a.jpg" style="width: 100%;height: auto;">(其中D：x2+y2≤1)化为极坐标系下的二次积分，其形式为() <img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/17/e6/17e69b62ae80e3bc82b1de7aa8463471.jpg" style="width: 100%;height: auto;"></p>