A universal pair of building panel holding brackets to assist in positioning and securing sheets of building panels to building wall studs, ceiling joists, and wall and ceiling framing. When a service request specifying a communication path to be assured is received from the user terminal, the server retrieves communication service definition information matched with the service request and notifies the search result to the user terminal. A floating diffusion layer between the transfer gate and the reset gate, a light receiving element at a side of the transfer gate away from and opposite to the floating diffusion layer and a sourcedrain region at a side of the reset gate away from and opposite to the floating diffusion layer are formed. The invention also includes a method for software maintenance. The compositions which harden into highly resilient solid masses having high strengths are basically comprised of a hydraulic cement, an aqueous rubber latex, an aqueous rubber latex stabilizing surfactant and silica hydrophobicized with silicon oil.