The present invention relates to a method of arranging user confirmation for data downloading. An online advertisement may be served to a user in response to a query or at a website. The slurry is supplied to each of coaxial polishing zones of the lower polishing plate via the corresponding ring-shaped ducts and the supply pipes. By having a separate bubble barrier zone, the plate affords enhanced water permeability while the bubble barrier maintains a gas seal. a near field communication and a body coupled communication.