(4)设E是球面 ^2+(y)^2+(z)^2=(a)^2 的外侧,则 ^3dydz+(y)^3dzdx+(z)^3dxdy= ()-|||-A.0 B.4πa^5 C. dfrac (12pi )(5)(a)^5 D. dfrac (4pi )(3)(a)^5