中国消费者报报道记者李洪涛）3月7日，《中国消费者报》记者站接到吉林省辽源市消费者朱女士的投诉，反映其母亲孙女士在参加一医疗器械经销公司开展的“可喜安”温热电位治疗仪体验式营销活动时，遭遇商家忽悠，花
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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