单项选择题
A crew member has suffered frostbite to the toes of the right foot. Which is NOT an acceptable first aid measure?（）
A.Rub the toes briskly B.Elevate the foot slightly C.Rewarm rapidly D.Give aspirin or other medication for pain if necessary
单项选择题 A copy of the Articles of Agreement，less the signatures，is required to be posted. This document is called the（）.
单项选择题 A continuous watertight bulkhead on a ship is normally also a(n)（）.
单项选择题 A continual worsening of the list or trim of any floating ship indicates（）.
