单项选择题
A.2.48% B.2.58% C.2.68% D.2.78%
A.1.39%-2.58% B.2.35%-2.58% C.1.4%-2.58% D.1.38%-2.48%
A.1.28%-2.58% B.0.99%-2.48% C.1.28%-2.48% D.0.99%-2.58%