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.
第十七条 纳税人以人民币以外的货币结算销售额的，在折合成人民币计算时，折合率可以选择销售额发生的当日或者当月1日有效的人民币汇率中间价。纳税人确定折合率后，12个月内不得变更。
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That trend continued until 2025, when there was a modest recovery in the sea ice in West Antarctica.
Фото: Petrov Sergey / news.ru / Globallookpress.com