单项选择题
A.in the ends of each tank
B.in the expansion trunk of each tank
C.above the weather deck
D.there are no requirements in the regulation
单项选择题 According to the Chemical Data Guide，when burning，the grade B flammable liquid，carbon disulfide produces（）.
单项选择题 According to regulations，a cargo hose used for transferring liquefied gases must have a bursting pressure of（）.
单项选择题 A vessel behaves as if all of its weight is acting downward through the center of gravity，and all its support is acting upward through the（）.