单项选择题 Fueling activities（）waste liquids and vapor releases to air.

单项选择题 Any Works completion date quoted by the Repairer is an estimate only and the Repairer shall not be（）liable for any failure to complete the Works by that date.

单项选择题 When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.