If we had stayed at that port much longer，we（）the tropical storm.

单项选择题If an airplane circles a vessel 3 times，crosses the vessel’s course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate?（）

A.The plane is in distress and will have to ditch
B.The plane is going to drop a package and wishes the vessel to recover it
C.Someone is in distress in that direction and the vessel should follow and assist
D.There is danger ahead and the best course is indicated by the direction of the aircraft

单项选择题Distress signals may be（）.

A.red flares
B.smoke signals
C.sound signals
D.Any of the above

单项选择题By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）

A.24 months
B.36 months
C.42 months
D.54 months

单项选择题At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.

A.in distress
B.approaching a bend in the channel
C.operating astern propulsion
D.intending to overtake another vessel

单项选择题AS SOON AS I HAVE FURTHER INFORMATION I WILL MAKE ANOTHER ANNOUNCEMENT. I ASK YOU KINDLY TO REMAIN CALM. THERE IS NO DANGER AT THIS TIME. These words are likely from（）.

A.the captain of a vessel in distress
B.representative of ship owners
C.an officer from port authorities
D.the pilot of a vessel entering a port in foreign country