<p>求（1）题中的平面图形绕<img src="https://file.gaojiufeng.cn/learnAppQuestion/19/88/198858305da6f61140ca0455faba762e.jpg" style="width: 100%;height: auto;">轴旋转一周所得旋转体的体积<img src="https://file.gaojiufeng.cn/learnAppQuestion/71/65/7165bd5c7dfb8e8518f8d27ecb266c4c.jpg" style="width: 100%;height: auto;"></p>