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双语早读丨床单应该多久洗一次?
床单多长时间洗一次?两星期?一个月?还是半年? 科学家给出了答案:一星期。 你的肉眼看不见,不代表你的床单不脏。如果床单超过一星期不洗,落在上面的各种细菌和真菌就会让你过敏甚至生病。
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