A . 0.1~0.5取0,0.6~0.9取1.0
B . 0.1~0.5取0.5,0.6~0.9取1.0
C . 0.1~0.5取0,0.6~0.9取0.5
D . 0.1~0.5取0.5,0.6~0.9取0.5