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
正确答案是D
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
正确答案是D