单项选择题
A.distress alert B.urgency message C.safety message D.routine message
Cirrocumulus belongs to（）.A.low cloudsB.High cloudsC.Sp...
单项选择题Cirrocumulus belongs to（）.
A.low clouds B.High clouds C.Special clouds D.medium clouds
Altostratus belongs to（）.A.Low cl;oudsB.High cloudsC.Sp...
单项选择题Altostratus belongs to（）.
A.Low cl;ouds B.High clouds C.Special clouds D.medium clouds
（）is a high layer of cloud in the front of small flakes...
单项选择题（）is a high layer of cloud in the front of small flakes or cauhflower,white in colour with no dark shadows in between.
A.Cirrostratus B.Cirrus C.Cirrocumulus D.Altostratus
