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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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中国消费者报上海讯记者孟刚）近日，上海市网信办、市市场监管局会同徐汇网信办、黄浦网信办，依法约谈3家企业，要求星巴克、Shake Shack、天泰餐厅针对过度收集个人信息行为进行全面整改，切实履行个人
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