(来学网)为使mA表稳定指示毫安值,曝光时间应大于
  • A.
    (来学网)0.1s
  • B.
    (来学网)0.2s
  • C.
    (来学网)0.3s
  • D.
    (来学网)0.4s
  • E.
    (来学网)0.5s