雾霾天气带什么样的口罩最合适
Choosing the right face mask against heavy pollution

 
Comment(s)打印 E-mail 中国广播网  2013-01-14
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记者将7副口罩摆在了桌上,曹晋桂挨个看了一遍以后,拿起了包装为“普通脱脂纱布口罩”的口罩说,这个是最没用的。[中国广播网 李雪南 摄]

 

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