Grey o3o
2021-10-13T05:36:24+00:00
定积分求面积的。[img]https://img.nga.178.com/attachments/mon_202110/22/-7Q7i87-hs4oZaT3cSsg-lc.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202110/22/-7Q7i87-1msnK1qT3cSlc-sg.jpg.medium.jpg[/img]