单项选择题
A.It increases its volume
B.It reduces its volume
C.It has less product per volume
D.None of the above
单项选择题 LFG tank and pipeline maintenance should include（）.
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 vessels carrying inflammable substances.
单项选择题 If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）