单项选择题
A.severe nausea and cramps
B.muscular convulsions with partial or complete loss of consciousness
C.sudden thirst and craving for candy
D.severe agitation and desire to get out of closed spaces
单项选择题 During the course of a voyage，a seaman falls on the main deck and injures his ankle. The Master should submit a Report of Marine Accident，Injury or Death if the（）.
单项选择题 After a person has been revived by artificial respiration，he should be（）.
单项选择题 According to the Chemical Data Guide，what does ethyl chloride produce when ignited?（）