單項(xiàng)選擇題

Symptoms of sea sickness include（）.

A.fever and thirst
B.nausea and dizziness
C.stomach cramps and diarrhea
D.reddening of skin and hives

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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

單項(xiàng)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