选 C对任意x，f(π/6-x)=f(x)则x=π/12是f(x)图象的对称轴得x=π/12是y=cos(ωx+φ)图象的对称轴x=π/12是y=sin(ωx+φ)的零点所以 g(π/12)=2·0+7=7
