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Erasing Data: To reset a cell, a high voltage of opposite polarity tunnels the electrons back out of the floating gate, returning it to the erased state (usually all ‘1’s). Erases happen in large blocks (4-16 MB) because cells are wired in series strings.，详情可参考体育直播
。谷歌浏览器【最新下载地址】是该领域的重要参考
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For 4 points, that is (1/2)3=1/8(1/2)^3 = 1/8(1/2)3=1/8, the same 12.5% we measured earlier. There is one such event for each of the NNN points, so we have NNN events each with probability 1/2N−11/2^{N-1}1/2N−1.