在北京备受雾霾天气困扰的一天,赵小姐来到朝阳区十里堡一家市场,发现了琳琅满目的口罩数十种,每个摊位上都摆着“PM2.5口罩”的招牌,口罩价格从两元到四十几元不等。她上前询问哪一款是防尘功能口罩时,销售人员说:“所有的都是。”这位销售人员告诉她,最近口罩生意特别好,前两年积压的存货都拿出来卖了。赵小姐花了10元钱买 Haze foggy weather in Beijing one day, Miss Zhao came to Shilipu Chaoyang District, a market, found dozens of assortment of masks, each stall are placed “PM2.5 mask” signs, masks Prices ranging from two yuan to forty dollars. When she approached to ask which one was a dust-proof mask, the sales staff said: “All of them.” The salesperson told her that the masks have done particularly well in the recent past and both the backlogs of the previous two years were sold out It’s Miss Zhao spent 10 yuan to buy