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中国消费者报北京讯记者武晓莉）为集中治理同城版块易发多发问题，切实净化同城版块网络生态环境，近日，中央网信办印发通知，在全国范围内部署开展为期2个月的“清朗•同城版块信息内容问题整治”专项行
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在化学分析与环境监测的广阔领域里，精准的pH值测量是基础中的基础。多年的实验室工作经验告诉我，一个微小的pH偏差，都可能对实验结果产生重大影响。而氢氧化钙pH溶液标准物质，正是那把确保我们测量准确无误
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