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https://www.zhihu.com/question/373993361 https://www.theverge.com/2020/2/25/21153158/amazon-coronavirus-face-masks-price-gouging-increase-third-party-sellers https://econlife.com/2020/02/face-mask-production/ 部分图片来源于网络 ABOUT THE AUTHOR RYTHE Age:17 坐标西安 ...
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图片来自于Amazon,版权属于原作者 外层多为蓝色或其他颜色,由阻水材料制成,可防止液体进入口罩至其内部; 中间为过滤层可阻挡病菌; 内层为白色,可以吸湿,吸附呼气时的水汽。 所以佩戴口罩时应该将白色的一面面向自己,有颜色的一面向外,才能有防护效果。
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