飞信会员的资费及计费规则？

A. shape of the vessel's underwater hull remains the same
B. vessel's center of gravity shifts to the center of the vessel's underwater hull
C. vessel's center of buoyancy shifts to the center of the vessel's underwater hull
D. vessel's mean draft increase

A. HLA-DP
B. HLA-B
C. HLA-DR
D. HLA-DQ
E. HLA-A

A. 正确
B. 错误