单项选择题
A.0.05% B.0.1% C.0.15% D.0.2%
A.1.1~1.2倍 B.1.1~1.5倍 C.1.1~1.6倍 D.1.1~1.8倍
A.1.5倍 B.2.2倍 C.2.5倍 D.3倍