(来学网)正常成人的PR间期为
  • A.
    (来学网)0.10~0.20S
  • B.
    (来学网)0.12~0.20S
  • C.
    (来学网)0.06~0.08S
  • D.
    (来学网)0.32~0.44S
  • E.
    (来学网)0.08~0.22S
正确答案:
B