单项选择题
0n 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.acceleration greater than on conventional vessels B.acceleration less than on conventional vessels C.acceleration the same as on conventional vessels D.no acceleration
单项选择题 0ne function of a hulwark is to（）.
单项选择题 0ne of the principal dangers inherent in liquified petroleum gas is（）.
单项选择题 0pen ullage holes in tanks which are not gas-free must be protected by（）.
