随着我国对环境空气污染物监测要求的不断提高，多氯联苯PCBs）作为持久性有机污染物POPs）的重要成员，其准确测定对环境保护和公共健康至关重要。为满足HJ 902-2017《环境空气 多氯联苯的测定

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中国消费者报报道记者裴莹）双11前夕，北京市第四中级人民法院公布一起电商虚假宣传官司终审判决，“坚果”投影机厂家因虚标参数被判构成欺诈。投影机近年来在社交平台频频被&ldquo

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