Never exceed speed or Mach number is the speed limit that may not be exceeded at any time. ( )
A.Never exceed speed or Mach number is the speed limit that can never be exceeded at any time. B.Never exceed speed or Mach number is the speed limitation that will be excessively at any time C.Never exceed speed or Mach number is the speed limit that may be surpassed at any time.正确答案A
