反应A→B t C1(A) (B) t2C2(4A)c2(B) 2(B)-C1(B)△c(B) r(B) △t 2(A)-C1(A)△c(A) r(A) t2-t1 △t反应 A → B t1 c1 (A) c1 (B) t2 c2 (A) c2 (B) r(B) = c2 (B) - c1 (B) t2 - t1 = Δc (B) Δt r(A) = c2 (A) - c1 (A) t2 - t1 = Δc (A) Δt