单项选择题
You are backing on twin engines with rudders amidships，when your port engine stalls.To continue backing on course，you should（）.
A.Apply left rudder B.Apply right rudder C.Increase engine speed D.Keep your rudder amidships
单项选择题 Which statement is TRUE concerning gasoline vapors on board a vessel（）.
单项选择题 Which statement is TRUE concerning fuel vapors on a vessel（）.
单项选择题 Which is a part of a vessel’s standing rigging（）.
