单项选择题
Fire in the cabins. Close all fire doors and use the （）powder extinguisher.
A.dry B.wet C.foam D.portable
单项选择题 After joining the ship, the crew members should be （）with their emergency duties.
单项选择题 Take off fore and aft boat （）.
单项选择题 Put all the fire-fighting equipment back in place and （）them away.
