国别文化

A. 颈椎
B. 胸椎
C. 腰椎
D. 骶椎
E. 尾椎

A. 正确
B. 错误

A. 颈段
B. 胸段
C. 腰段
D. 骶段
E. 尾段

A. a ship security plan
B. a ship security officer
C. a company security officer
D. certain onboard equipment