单项选择题
On the fully containerized ship，approximately one-third or more of the cargo is on deck above the rolling center. Top stowed containers are subject to（）.
A.accelerations greater than on conventional vessels B.accelerations less than on conventional vessels C.accelerations the same as on conventional vessels D.no accelerations
单项选择题 The advantage of container transportation is to（）.
单项选择题 There should be at least two tiers of dunnage for the cargo loaded on tank top，the first tier laid（）.
单项选择题 When cargo is shifted from the main deck into the lower hold of a vessel，（）.
