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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As far as WIRED can tell, no one has ever died because a piece of space station hit them. Some pieces of Skylab did fall on a remote part of Western Australia, and Jimmy Carter formally apologized, but no one was hurt. The odds of a piece hitting a populated area are low. Most of the world is ocean, and most land is uninhabited. In 2024, a piece of space trash that was ejected from the ISS survived atmospheric burn-up, fell through the sky, and crashed through the roof of a home belonging to a very real, and rightfully perturbed, Florida man. He tweeted about it and then sued NASA, but he wasn’t injured.
Then there's Pombon, the fire-type Pomeranian who looks like it would absolutely commit arson but in a cute way. All fluff and spark, Pombon feels genetically engineered to dominate plush sales and social media edits. The fire-dog lineage is a sacred one in Pokémon history, and fans were quick to declare this tiny blaze ball their ride-or-die little guy.。关于这个话题,WPS官方版本下载提供了深入分析
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