单项选择题
（）are mainly caused by the gravitational pull of the moon.
A.Tides
B.Sea
C.Swell
D.Wind
点击查看答案&解析
相关考题
-
单项选择题
（）generally indicates that a gale or storm is approaching.
A.Falling barometric pressure
B.Rising barometric pressure
C.The circulations of winds
D.The change of wind direction -
单项选择题
（）indicates unstable weather.
A.The persence of cirrus clouds
B.The low-hanging stratus clouds
C.The altocumulus clouds
D.The massive cumulus clouds -
单项选择题
（）may be a warning for an approaching storm.
A.The persence of cirrus clouds
B.The low-hanging stratus clouds
C.The altocumulus clouds
D.The massive cumulus clouds
