单项选择题 In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.

单项选择题 In the Northern Hemisphere，what type of cloud formations would you expect to see to the west of an approaching tropical wave?（）.

单项选择题 In the Northern Hemisphere，the largest waves or swells created by a typhoon or hurricane will be located（）.