下列物质用酸碱滴定法能准确滴定的是 () 。-|||-A. .1mol/L HF((K)_(a)^theta =6.6times (10)^-4)-|||-B. .1mol/LHCN((K)_(a)^-=6.2times (10)^-10)-|||-C. .1mol/LNaAc((K)_(a)^theta =1.8times (10)^-5)-|||-D. .1mol/LN(H)_(4)Cl((K)_(b)^theta =1.8times (10)^-5)