The invention discloses a method of forming threshold voltage adjustment for MOS transistors. The switch includes a first data port interface, supporting at least one data port transmitting and receiving data at a first data rate and a second data port interface, supporting at least one data port transmitting and receiving data at a second data rate. With the apparatuses and methods provided in the present invention, the problem of how to select the transport control mechanism to be used between the media server and the media client is well solved. A switcher selectively supplies at least one of the waveform elements included in one of the drive signals to the piezoelectric element. Once the fasteners are initially placed, the prosthesis is placed on the long legs of the placed fasteners and is guided into position on the legs. An evaluation section 105 evaluates each BGP route on the basis of the registration contents of the management table 104.