An image memory is composed of a memory cell array, first and second area selecting circuits, and a write circuit. If the m-bpc page fails the test, counting a block associated with the failed m-bpc page to -bpc blocks, wherein each said m-bpc page is subjected to at most one time of programming and reading. The recycling apparatus also includes a first chamber connected to an outlet of the compressor, where the first chamber is configured to receive compressed gas from the compressor and to collect a mixture including the solvent and any contaminants entrapped or dissolved in the solvent. Determining whether the result is stored in a cache unit in the network. Corner pieces 215-218 are folded into a corner shape at an outlet edge 412 and rolled into a curved shape at an inlet edge 411.