A.1:1:1 B.2:2:1 C.1:2:1 D.1:2:2
A.﹤0.08 B.工作風(fēng)壓0.1~0.2 C.工作風(fēng)壓﹥0.12 D.1
A.15% B.20% C.25% D.50%