• 2022-06-19
    18030c44b183705.png, 则二重积分[img=69x48]18030c44b922c06.png[/img]等于
    A: [img=9x43]18030c44c1ee4f3.png[/img]
    B: [img=9x43]18030c44c9d39b2.png[/img]
    C: 1
    D: [img=9x43]18030c44d29c3b8.png[/img]
    E: [img=9x43]18030c44daf4dee.png[/img]
    F: 0