求由抛物线<img src="https://static.zxtiku.com/wangke/imgs/topic/cddef202119f3b1c61c406a0f5cee508.png"/> 与直线<img src="https://static.zxtiku.com/wangke/imgs/topic/e4da35bfde7d2eabc168e9b1f3cddb53.png"/> 和<img src="https://static.zxtiku.com/wangke/imgs/topic/6565ab8d03dbe3f0804af9cd2ee341d0.png"/> 轴所围且位于第一象限内的平面区域<img src="https://static.zxtiku.com/wangke/imgs/topic/0cda0f5db48b4b9cc56f8c7e323f9285.png"/> 绕<img src="https://static.zxtiku.com/wangke/imgs/topic/e3102eee9ad4301d6c947e728e3ddd29.png"/> 轴旋转一周所形成的旋转体的体积<img src="https://static.zxtiku.com/wangke/imgs/topic/6b0ecc2513c749a0304b9c09bb122e9a.png"/> .( )