单项选择题
The （）is fixed at the bottom of the derrick.
A.gooseneck B.block C.derrick step D.crane
单项选择题 The （）is pumped onto the ship at the loading port by shore pumps.
单项选择题 The standard size of the containers is （）high.
单项选择题 This is deck cargo. （）stow it in the holds.
