On open lifeboats，the purpose of the wire stretched between the davit heads is to（）.

A.keep the movement of the davits at the same speed

B.keep the davits from slipping when they are in the stowed position

C.prevent vibration during lowering of the boat

D.support the manropes

培训结束后受训人员填写（），通常由受训人员所在部门的管理人员或培训部相关人员进行，检验培训效果。

A.员工培训考核登记表

B.培训评估表

C.培训效果跟踪调查表

D.员工培训登记表