An air-conditioner ECU sets the maximum flowrate or a set flowrate which is less than the maximum flowrate as a required flowrate Vr based on outside air temperature when a DEF mode is selected, and requires that coolant be circulated. Communication requests may be prioritized, depending upon the type of communication desired and whether the request is being made by the driver or a passenger. A plurality of solder balls are formed on the back surface of the substrate such that an interval A between the closest solder balls of adjacent semiconductor chips becomes n times an interval B between the solder balls on the semiconductor chip. As explained above, once the accumulated charge has been dissipated, the speed penalty for successive accesses to the memory subarray is eliminated or greatly reduced. The ball can be used to hold a matrix band against an adjacent tooth prior to andor while incrementally curing a light curable composition. The negative electrode includes an alloy having a hexagonal closest packing structure and a Ni2In type structure composed of at least two elements.