砷元素溶液标准物质：满足环境监测与毒理研究的严格需求

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中国消费者报上海讯记者刘浩）近日，有消费者反映，用苹果手机购买视频软件的会员服务，价格比安卓手机贵。对此，上海市闵行区消费者权益保护委员会对比了苹果、安卓、电脑三个渠道的5款视频软件会员收费情况。结果

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