单项选择题
The passing of a low pressure system can be determined by periodically checking the（）.
A.Thermometer B.Hygrometer C.Barometer D.Anemometer
单项选择题 The moisture equilibrium chart can be used to determine the（）.
单项选择题 The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
单项选择题 The doldrums are characterized by（）.
