单项选择题
A.10-8~10-6mol/LB.10-9~10-7mol/LC.10-10~10-8mol/LD.10-11~10-9mol/L
A.10-4~10-3mol/LB.10-5~10-4mol/LC.10-6~10-5mol/LD.10-7~10-6mol/L
A.10%B.40%C.20%D.80%