单项选择题
Symptoms of heat stroke are（）.
A.cold and moist skin，high body temperature B.cold and dry skin，low body temperature C.hot and moist skin，high body temperature D.hot and dry skin，high body temperature
单项选择题 Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.
单项选择题 Seawater may be used for drinking（）.
单项选择题 Once you have established the daily ration of drinking water in a survival situation，how should you drink it?（）
