A.20°~50°
B.40°~60°
C.60°~100°
D.180°

A.人工观测能见度
B.透射式能见度仪
C.散射式能见度仪
D.激光雷达能见度仪

A.雨层云
B.高积云
C.积雨云
D.层积云

A.卷云
B.高层云
C.卷层云
D.卷积云

A.三者一样大
B.层积云最大
C.高积云最大
D.卷积云最大

A.两者视宽度角一样大
B.层积云视宽度角大
C.高积云视宽度角大

A.7/1
B.7/2
C.7/3
D.7/4

A.1/1
B.2/1
C.1/0
D.2/0

A.10/0
B.10/10
C.100/0
D.100/100

A.0/0
B.10/0
C.10/10
D.-/-

A.0/0
B.10/0
C.10/10
D.-/-