单项选择题
A.17-19 B.16-17.3 C.11-12.5 D.18-20
A.14.8以上 B.13.0以下 C.13.0-14.0 D.13.8~14.5
A.2.8~3.2 B.3.0~3.5 C.2.4~3.8 D.2.9~3.9