单项选择题
When force of winds reaches 10-11 in Beaufort scale，we usually call such wind（）.
A.Gale B.Storm C.Hurricane D.Typhoon
单项选择题 When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.
单项选择题 What will a veering wind do（）.
单项选择题 What benefit is a weather bulletin to a mariner（）.
