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.
However, Kosmos 482's parachute system, originally intended to slow the lander's descent towards Venus, is likely to have degraded after more than 50 years in space.
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Раскрыты подробности похищения ребенка в Смоленске09:27。业内人士推荐WPS下载最新地址作为进阶阅读
Essential digital access to quality FT journalism on any device. Pay a year upfront and save 20%.。关于这个话题，Line官方版本下载提供了深入分析
The team on the ground held its breath until the parachutes deployed and the crew was safely down.