ACH(l)＋O(g)===CO(g)＋HO(g)BCH(g)＋O(g)===CO(g)＋HO(g)CCH(g)＋O(g)===CO(g)＋HO(l)DCH(g)＋/O(g)===CO(g)＋HO(l)