单项选择题
A.The persence of cirrus clouds B.The low-hanging stratus clouds C.The altocumulus clouds D.The massive cumulus clouds
Nimbus means（）.A.rainB.highC.layerD.cirrus
单项选择题Nimbus means（）.
A.rain B.high C.layer D.cirrus
Alto stands for（）.A.rainB.highC.layerD.cirrus
单项选择题Alto stands for（）.
（）is an indication that the weather is about to clear.A...
单项选择题（）is an indication that the weather is about to clear.
A.Rising clouds B.Lowering clouds C.Thickening clouds D.Scattering clouds
