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天然气-天然气，是一种多组分的混合气态化石燃料，主要成分是烷烃，其中甲烷占绝大多数，另有少量的乙烷、丙烷和丁烷。它主要存在于油田、气田、煤层和页岩层。天然气燃烧后无废渣、废水产生，相较煤炭、石油等能源有使用安-tianranqi</br> generated by yvsou girl
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(28.56701.236.7261.7285.7420)
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(28.56701.236.7261.7285.7420)