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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1.單項(xiàng)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

2.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

3.單項(xiàng)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

4.單項(xiàng)選擇題Once you have established the daily ration of drinking water in a survival situation，how should you drink it?（）

A.Small sips at regular intervals during the day
B.The complete daily ration at one time during the day
C.One-third the daily ration three times daily
D.Small sips only after sunset

5.單項(xiàng)選擇題On an oceangoing vessel，for each person a lifeboat (without desalting kits) is certified to carry，the boat must be supplied with（）.

A.2 pounds of condensed milk
B.a signaling whistle
C.3 litres of water
D.a life preserver