单选题One of the principal dangers inherent in liquefied petroleum gas is（）.Aas it warms up it becomes heavier than airBthe way it reacts with sea waterCthe strong odor it producesDits low temperature causes frostbite or freezing
单选题
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
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