A multi-mode predictor for a processor having a plurality of prediction modes is disclosed. An etch stop layer is formed on a dielectric layer. This makes it possible to provide the light-emitting device which reduces absorption of light so as to achieve excellent light extraction efficiency, and is highly reliable. The pressure applied by the pushing unit to the cleaning member is restored when the boomerang cam is turned as a motion interlocked with the operation of mounting the belt cleaner in position and the pressure release cam is taken out from the release position. Thus the release amount of copper ions is controllable, the volume of the disinfector is reduced, and the corrosion between the positive and negative electrodes of the copper billet is uniform. Turbines extend between the vanes and shaft for rotating the mixing device.