对于方程式2E(l)+F(g)=3G(s)，以下标准平衡常数表达式正确的是（ ）A. K^theta=([frac(c_{eq)(G))/(c^theta)]^3}([(c_{eq)(E))/(c^theta)]^2[(p_(eq)(F))/(p^theta)]}B. K^theta=(1)/([frac(c_{eq)(E))(c^theta)]^2[(p_(eq)(F))/(p^theta)]}C. K^theta=(p^theta)/(p_(eq)(F))D. K^theta=(p_(eq)(F))/(n^theta)

A. $K^{\theta}=\frac{[\frac{c_{eq}(G)}{c^{\theta}}]^{3}}{[\frac{c_{eq}(E)}{c^{\theta}}]^{2}[\frac{p_{eq}(F)}{p^{\theta}}]}$

B. $K^{\theta}=\frac{1}{[\frac{c_{eq}(E)}{c^{\theta}}]^{2}[\frac{p_{eq}(F)}{p^{\theta}}]}$

C. $K^{\theta}=\frac{p^{\theta}}{p_{eq}(F)}$

D. $K^{\theta}=\frac{p_{eq}(F)}{n^{\theta}}$