单选题Which step should normally be taken FIRST by those who have boarded a liferaft in an emergency?（）ARation food and water suppliesBTake anti-seasickness pills，if availableCDetermine position and closest point of landDCheck pyrotechnic supplies
单选题
Which step should normally be taken FIRST by those who have boarded a liferaft in an emergency?（）
A
Ration food and water supplies
B
Take anti-seasickness pills，if available
C
Determine position and closest point of land
D
Check pyrotechnic supplies
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