单项选择题
Securing cargo by running timbers from an upper support down to the cargo，either vertically or at an angle，is called（）.
A.braces B.dunnage C.shores D.toms
单项选择题 Roll-on／roll-off ships are equipped with（）.
单项选择题 Precautionary measures must be taken to（）safety of the stevedores，cargo and the ship.
单项选择题 Please stow the drums（）ends.
