• 2022-06-16
    设∫f(x)dx=x2+C,则[img=171x48]17f3f5d051290be.jpg[/img]=()
    未知类型:{'options': ['1', '-1', '[img=17x36]17f3f5d852fd65c.jpg[/img]', '[img=36x37]17f3f5d8e2d8f0c.jpg[/img]'], 'type': 102}