下列典型物质中，不属于可燃气体的是（ ）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31811' and id < 2542481 and id<>'2542481' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31811' and id > 2542481 and id<>'2542481' order by id asc limit 5