1. 염소 소독법에 대한 설명으로 옳지 않은 것은?
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[]
[717626,717627,717628,717629,717630,717631,717632,717633,717634,717635]
{"717626":[1,2,3,4],"717627":[1,2,3,4],"717628":[1,2,3,4],"717629":[1,2,3,4],"717630":[1,2,3,4],"717631":[1,2,3,4],"717632":[1,2,3,4],"717633":[1,2,3,4],"717634":[1,2,3,4],"717635":[1,2,3,4]}
exam
156547646