(来学网)在下列各种试剂中,用作缓冲溶液的是
  • A.
    (来学网)HC2H302+NaC2H3O2
  • B.
    (来学网)HCl+HC2H3O2
  • C.
    (来学网)NaOH+NH4OH
  • D.
    (来学网)HCl+NaCl
  • E.
    (来学网)NaOH+NaCl