單項選擇題

One of the principal dangers inherent in liquefied petroleum gas is（）.

A.as it warms up it becomes heavier than air
B.the way it reacts with sea water
C.the strong odor it produces
D.its low temperature causes frostbite or freezing

你可能感興趣的試題

單項選擇題

Name one major advantage of transporting gas under refrigeration.（）

A.It increases its volume
B.It reduces its volume
C.It has less product per volume
D.None of the above

單項選擇題

LFG tank and pipeline maintenance should include（）.

A.exclusion of all sand and solid matter
B.cleaning with clean fresh or sea water
C.examination for fractures and pitting
D.All of the above