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A. B.
C. D.
A.K= B.K= C.K= D.K=
A.K= B.K=
C.K= D.K=
对于3Fe(s)+4H2O(g)Fe3O4(s)+4H2(g),反应的化学平衡常数的表达式为( )
A.K= B.K= C.K= D.K=