Nowadays we can buy the COVID 19 antigen test kits（抗原检测试剂盒）in stores and online, and then we can test COVID 19 by （我们自己

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1. (2023八下·余姚期中) Nowadays we can buy the COVID 19 antigen test kits（抗原检测试剂盒）in stores and online, and then we can test COVID 19 by （我们自己）.

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1. (2023八下·余姚期中) Nowadays we can buy the COVID 19 antigen test kits（抗原检测试剂盒）in stores and online, and then we can test COVID 19 by （我们自己）.