单项选择题
A.+0.060~-0.016 B.+0.071~-0.016 C.+0.079~-0.018 D.+0.088~-0.020
A.1/1000 B.0.1/1000 C.0.02/1000 D.0.03/1000
A.10% B.15% C.20% D.30%