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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国务院有关部门对放射性物品运输企业和运输过程实行严格监督和管理。。WPS下载最新地址是该领域的重要参考
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