本报北京电(驻京记者程福俊)最近一个时期，南非连续发生我国公民遇袭身亡事件，仅9月18日后的5天内就有4人死亡，2人重伤。鉴于以上情况，我国驻南非使馆教育组和教育部昨天特别紧急提醒赴南非留学人员，要重
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在化学分析领域，每一次精准的测量都离不开标准物质的可靠支持。作为一名在化学分析行业深耕多年的专家，我深知选择合适的标准物质对于实验结果的准确性和可靠性至关重要。在众多标准物质中，硫酸铈滴定溶液凭借其独
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