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學習快評丨qibao666888　　第??(di)一??(yi)道??(dao)防??(fang)御??(yu)是??(shi)物??(wu)理??(li)屏??(ping)障??(zhang)??，比??(bi)如??(ru)皮??(pi)膚??(fu)和??(he)黏??(nian)膜??(mo)??，像??(xiang)城??(cheng)墻??(qiang)一?(yi)樣??(yang)覆??(fu)蓋??(gai)體??(ti)表??(biao)??，通?(tong)過?(guo)汗??(han)液??(ye)、皮?(pi)脂??(zhi)和??(he)黏??(nian)液??(ye)中??(zhong)的??(de)抗秘(kang)菌??(jun)成?(cheng)分??(fen)??，直??(zhi)接??(jie)阻?(zu)擋??(dang)細??(xi)菌??(jun)、病??(bing)毒??(du)入??(ru)侵??(qin)；比??(bi)如??(ru)呼??(hu)吸??(xi)道??(dao)纖??(xian)毛??(mao)??，如?(ru)同??(tong)護??(hu)城??(cheng)河??(he)的??(de)“清??(qing)道??(dao)夫?(fu)”??，通??(tong)過??(guo)擺??(bai)動??(dong)??，將??(jiang)灰??(hui)塵??(chen)和?(he)病??(bing)原??(yuan)體??(ti)排??(pai)出??(chu)體??(ti)外??(wai)??。??。