单项选择题 A situation has occurred in which your vessel must be towed. When the towing vessel passes the towing line to you，you should secure the line（）.

单项选择题 A loaded hopper barge with independent tanks has a placard，with alternating red and white quadrants，on each side and end. Which statement concerning this barge is TRUE?（）

单项选择题 A cargo of refrigerated fruit is packed in crates with transverse members dividing the crate in two equal parts. Which statement is TRUE?（）