单项选择题

A minor heat burn of the eye should be treated by（）.

A.gently flooding with water
B.warming the eye with moist warm packs
C.laying the person flat on his back
D.mineral oil drops directly on the eye

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单项选择题
A mechanical davit is designed to automatically（）.

A.position the boat at the embarkation station
B.lift the boat off the inboard chocks
C.energize the winch for the falls
D.set the brake on the winch
单项选择题
A helicopter making a round trip from a helideck with refueling capabilities to an unmanned platform will take 45 minutes each way. The helicopter should be carrying enough fuel to last（）.

A.45 minutes
B.1 hour and 15 minutes
C.1 hour and 30 minutes
D.2 hours
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