单项选择题
Hatch No.1 must be cleaned up to meet the（）of the cargo surveyors．
A.necessity B.responsibility C.requirement D.stipulation
单项选择题 During fueling，all doors，hatches，and ports（）.
单项选择题 Cracks may be prevented from developing at the corners of welded plating inserts by（）.
单项选择题 Connecting elements of a mooring system should be fabricated from（）.
