1. 选择步长序列（如: n/2, n/4, ..., 1）
The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
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Накануне пожары случились в Уссурийском лесничестве (120 гектаров), еще чуть раньше сгорели 5600 гектаров в лечебно-оздоровительной местности «Ясное», а также более 7000 гектаров — в других районах. За январь, уточняют авторы публикации, огнем было пройдено 842 гектара леса.，详情可参考heLLoword翻译官方下载
And no matter what, the plan to use Russian assets remains problematic, since the ISS would have a “shallower reentry,” NASA says, and sprinkle surviving debris over a larger-than-desired area. Still, NASA would retain significant control over where any of these extant shards might plop down. They’ll probably land in the ocean, just as the space agency has always hoped. Sure, the station would have died before its time, but the thing was getting old. Most likely, it will be fine.，推荐阅读safew官方下载获取更多信息