ab=4/9,a和b请选择ABC0F-]-c2X9_-Z*~4t;Q,?:I)H/@/e*K-@8W5E7C1G,[
A.成反比例;Q,?:I)H/@/e*K-@8W5E7C1G,[
B.成正比例;Q,?:I)H/@/e*K-@8W5E7C1G,[
C.不成比例;Q,?:I)H/@/e*K-@8W5E7C1G,[