A.大于10°B.大于5°C.大于1°D.不大于1°
A.0.9~1.0 B.1.0~1.2 C.1.2~1.4 D.1.6~1.8
A.0.9~1.0 B.1.0~1.2 C.1.2~1.4 D.1.4~2.0