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近日，清华大学恢复对社会公众开放暑期校园参观，时间从7月8日持续至8月6日，周一除外。开放日入校时间为9:00至11:00，14:00至16:00。校园参观实行网上实名预约，参观者从指定校门出入，预约
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甲烷二磺酸亚甲酯MMDS）作为锂离子电池电解液中的关键添加剂，其含量控制直接影响电池的高温循环性能与使用寿命。然而，由于MMDS在强酸强碱条件下易水解、高温环境下易分解的特性，其检测过程对标准品的纯度
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