游泳比赛时，哪一种护具不能配戴（）

A.脚蹼

B.泳镜

C.鼻夹

D.耳塞

Ships carrying 15 or more seafarers and engaged in a voyage of more than three day’s duration shall provide separate hospital accommodation to be used（）.

A.for other purposes

B.exclusively for medical purposes

C.for a common ship‟s office

D.by deck and engine departments