(来学网)频率为2.0MHz的超声在人体软组织中传播时的波长为
  • A.
    (来学网)0.72MM
  • B.
    (来学网)0.77MM
  • C.
    (来学网)0.75MM
  • D.
    (来学网)0.71MM
  • E.
    (来学网)0.79MM