单项选择题
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
A.coastal breeze B.sea breeze C.land breeze D.mistral
单项选择题 Which of the following shall not the officers in charge of the navigational watch do?（）
单项选择题 The helm command PORT TWENTY means（）.
单项选择题 The circulation around a low pressure center in the Northern Hemisphere is（）.
