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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??(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)??。??。