单项选择题
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
A mechanical davit is designed to automatically（）.A.pos...
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
A helicopter making a round trip from a helideck with r...
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
A floating ship with an initial negative metacentric he...
单项选择题A floating ship with an initial negative metacentric height（）.
A.will capsize B.will incline further C.may lie at an angle of loll D.may be initially level
