0ne of the principal dangers inherent in liquified petroleum gas is（）.
- Aas it warms up it becomes heavier than air
- Bthe way it reacts with sea water
- Cthe strong odor it produces
- Dits low temperature causes frostbite or freezing
问题
0ne of the principal dangers inherent
参考解析：
分类：航海英语综合练习题库
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