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單項選擇題

Upon release to the atmosphere，LFG readily（）.

A.vaporizes
B.attacks caustically
C.rises
D.attacks corrosively

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單項選擇題

To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.

A.Certificate of Inspection
B.loading order
C.rules and regulations for tankers
D.tankerman's document

單項選擇題

The weight of liquefied petroleum gas vapors as compared to air is（）.

A.variable
B.the same
C.lighter
D.heavier

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