单项选择题
A.placing bunker on the deck
B.building a stage on which to place the cargo
C.welding steel feet to the deck, on which the cargo is placed
D.erecting vertical pillars under the deck to support the cargo
单项选择题 It should be noted（）the use of synthetic mooring ropes able to produce sparks by their manipulation is absolutely forbidden on board petroleum tankers and LPG or LNG carriers, or any vessel carrying inflammable substances.
单项选择题 Keeping certain crgoes separated because of the their inherent characteristics is known a（）.
单项选择题 Limber is a term associated with（）.