单项选择题
A.3.5,2.5 B.3.47,2.45 C.3.05,2.0 D.3.1,2.1
A.10.0,13.5 B.9.31,12.6 C.10.31,13.6 D.11.31,12.6
A.-10~41.4 B.-15~40.4 C.-20~41.4 D.-20~20.5