單項選擇題

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

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單項選擇題

Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.

A.vomiting
B.blue color and lack of breathing
C.irregular breathing
D.unconsciousness

單項選擇題

Seawater may be used for drinking（）.

A.under no conditions
B.at a maximum rate of two ounces per day
C.if gathered during or immediately after a hard rain
D.after mixing with an equal quantity of fresh water