单项选择题
A.vomiting B.blue color and lack of breathing C.irregular breathing D.unconsciousness
Seawater may be used for drinking（）.A.under no conditio...
单项选择题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
Once you have established the daily ration of 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?（）
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
On an oceangoing vessel，for each person a lifeboat (wit...
单项选择题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
