Hard disk drives (HDDs) use spinning platters and magnetic heads to store data. Data is stored by flipping the magnetic polarity on the platters as they spin around at 5400 RPM or more which merely rearranges existing atoms.
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Израилю грозит ядерная катастрофа, если Тель-Авив продолжит попытки смены режима в Иране. Об этом сообщило агентство ISNA со ссылкой на неназванный военный источник.，更多细节参见体育直播
What are Moon phases?NASA says the Moon takes around 29.5 days to circle Earth, moving through a set of eight distinct phases along the way. Even though we always see the same side of the Moon, the portion lit by the Sun changes as it travels, which is why it can look full, half-lit, or barely visible at different points in the cycle. These changing views are what we call the lunar phases, and there are eight in total:，详情可参考wps下载
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