试题与答案

0ne of the principal dangers inherent in l

题型:单项选择题

题目:

0ne of the principal dangers inherent in liquified petroleum gas is().

A.as it warms up it becomes heavier than air

B.the way it reacts with sea water

C.the p odor it produces

D.its low temperature causes frostbite or freezing

答案:

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