Before opening and closing the hatches, the spaces around the covers, all the parts and the gears should be （）.

单项选择题The foreman said three （）would come on board to load cargo.

A.teams
B.parties
C.gangs
D.pairs

单项选择题The wire ropes and blocks, or pulleys, on a ship are called （）.

A.fittings
B.riggings
C.equipment
D.device

单项选择题Each cover consists of two or （）panels.

A.two
B.one
C.more
D.much

单项选择题A （）is at the end of the cargo runner for picking up the load.

A.sling
B.hook
C.block
D.tackle

单项选择题The （）is fixed at the bottom of the derrick.

A.gooseneck
B.block
C.derrick step
D.crane