5.平面区域 = (x,y)|{x)^2+(y)^2leqslant 1} ,并设 =(iint )_(D)((x+y))^3dxdy =iint (cos )^2x(cos )^2ydxdy ,-|||-=iint [ (e)^-((x^2+{y)^2)}-1] dxdy ,则有 () .-|||-(A) gt Ngt P (B) gt Mgt P-|||-(C) gt Pgt N (D) gt Pgt M