单项选择题
The Beaufort scale is used to estimate the（）.
A.Wind direction B.Percentage of cloud cover C.Wind speed D.Barometric pressure
单项选择题 The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.
单项选择题 The AMVER system requires（）.
单项选择题 Of the following，（）is not a wind.
