赞题库-背景图
单项选择题

设D为单位圆x 2 +y 2 ≤1,I 1 =
(2x 6 +y 5 )dxdy,则( )

A.I 1 <I 2 <I 3
B.I 3 <I 1 <I 2
C.I 3 <I 2 <I 1
D.I 1 <I 3 <I 2