单项选择题
A.3%,87% B.5%,85% C.8%,85% D.10%,80%
A.70%—90% B.75%—95% C.80%—100% D.85%—110%
A.0.5% B.1% C.1.5% D.2%
A.800 B.900 C.1000 D.1100
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