更多“瓦斯主要由H<sub>2</sub>、C<sub>1</sub>、C<sub>2</sub>、C<sub>3</sub>、C<sub>5</sub>组成。其特性是易燃、易爆，瓦斯气体比大气重1.5～2倍。瓦斯跑出后易沉积在地面或低洼处，极易混合成爆炸性气体。瓦斯着火燃烧速度快，爆炸威力大。”相关的问题
A、△H<sub>1sub>〉△H<sub>2sub>，W<sub>1sub>〈W<sub>2sub> B、△H<sub>1sub>〈△H<sub>2sub>，W<sub>1sub>〉W<sub>2sub> C、△H<sub>1sub>=△H<sub>2sub>，W<sub>1sub>〈W<sub>2sub> D、△H<sub>1sub>=△H<sub>2sub>，W<sub>1sub>〉W<sub>2sub>
A、H<sub>2sub>；CH<sub>4sub>；C<sub>2sub>H<sub>2sub>；C0 B、H<sub>2sub>；C<sub>2sub>H<sub>2sub> C、H<sub>2sub>
A、H<sub>2sub>，CH<sub>4sub>，C<sub>2sub>H<sub>2sub>，C0 B、H<sub>2sub>，C<sub>2sub>H<sub>2sub> C、H<sub>2sub>
A、H<sub>2sub>→C<sub>2sub>H<sub>4sub>→C<sub>3sub>H<sub>6sub>→C<sub>2sub>H<sub>2sub>→CO B、H<sub>2sub>→CO→C<sub>2sub>H<sub>4sub>→C<sub>3sub>H<sub>6sub>→C<sub>2sub>H<sub>2sub> C、H<sub>2sub>→C<sub>2sub>H<sub>4sub>→C<sub>3sub>H<sub>6sub>→CO→C<sub>2sub>H<sub>2sub> D、CO→H<sub>2sub>→C<sub>2sub>H<sub>4sub>→C<sub>3sub>H<sub>6sub>→C<sub>2sub>H<sub>2sub>
A、C+O<sub>2sub>=CO<sub>2sub> B、C+O<sub>2sub>=CO C、CO+H<sub>2sub>O=CO<sub>2sub>+H<sub>2sub> D、C+H<sub>2sub>O=CO+H<sub>2sub>
A、H<sub>2sub>S＋1/2O<sub>2sub>=1/2S<sub>2sub>+H<sub>2sub>S B、CH<sub>4sub>＋2O<sub>2sub>=CO<sub>2sub>＋2H<sub>2sub>O C、2H<sub>2sub>S＋3O<sub>2sub>=2SO<sub>2sub>＋2H<sub>2sub>O D、COS+H<sub>2sub>O=CO<sub>2sub>+H<sub>2sub>S
A、CFCl<sub>3sub> B、H<sub>2sub>O C、CH<sub>2sub>C<sub>12sub> D、C<sub>5sub>H<sub>12sub> E、TDI
A、CH<sub>4sub>、CO、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub> B、CH<sub>4sub>、CO、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub>、C<sub>2sub>H<sub>2sub> C、CH<sub>4sub>、C<sub>2sub>H<sub>2sub>、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub> D、CO、CO<sub>2sub>、H<sub>2sub>、CH<sub>4sub>、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub>
A、H<sub>1sub>、H<sub>2sub>A、H<sub>2sub>B、H<sub>3sub> B、H<sub>1sub>、H<sub>2sub>A、H<sub>2sub>B、H<sub>3sub>A C、H<sub>2sub>A、H<sub>2sub>B、H<sub>3sub>、H<sub>4sub> D、H<sub>2sub>A、H<sub>2sub>B、H<sub>3sub>A、H<sub>4sub>
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