单项选择题
According to the customs of this port, the work of opening and closing hatch covers is done by（）.
A.the ship's officers B.the foreman from the shore C.the ship's hands D.the tally man
单项选择题 Advise（）your fishing gear.
单项选择题 After abandoning ship, you should deploy the sea anchor from a life raft to（）.
单项选择题 After being launched from a vessel, totally enclosed survival craft which have been afloat over a long period require（）.
