提升医疗卫生服务的公平性、可及性
Lithium-ion batteries are simply not meant to stay empty, so most tablets don't truly hit 0% when they shut down. Instead, they shut down with a little charge to protect the battery, which is why a low-battery screen appears when you try to turn them on. If you leave your tablet with a drained battery for days, weeks, or months, the battery continues to slowly discharge until the voltage drops too low, potentially damaging the battery's internal chemistry.
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1999年，學生抗議曾一度構成威脅，但最終被壓制。
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