A.基元反應(yīng) B.基元反應(yīng)和大部分非基元反應(yīng) C.非基元反應(yīng) D.所有化學(xué)反應(yīng)
A.50s B.15s C.30s D.21.65s
A.1/3 B.1/4 C.1/8 D.1/16