男，37岁，颈部疼痛，活动时加重，休息可减轻，夜间有盗汗，结合图像，最可能的诊断是()

A．骨巨细胞瘤

B．颈椎骨转移

C．颈椎退行性变

D．颈椎结核

E．骨髓瘤

On inflatable liferafts，the operating cord should be renewed by（）.

A.cutting the old line off and renewing same

B.an approved servicing facility ashore

C.opening the case and replacing the entire line

D.one of the ship's officers