美女 大胸 爆乳 在线视频

　　先??(xian)天??(tian)性??(xing)免??(mian)疫??(yi)是??(shi)人??(ren)類??(lei)與??(yu)生?(sheng)俱??(ju)來(lái)??(lai)的?(de)防??(fang)御??(yu)系??(xi)統(tǒng)??(tong)??，如??(ru)同??(tong)城??(cheng)堡??(bao)的??(de)第??(di)一??(yi)道??(dao)城??(cheng)墻??(qiang)和??(he)巡??(xun)邏??(luo)衛(wèi)??(wei)兵??(bing)??，能??(neng)在??(zai)病??(bing)原??(yuan)體??(ti)入??(ru)侵??(qin)時(shí)??(shi)迅??(xun)速??(su)反??(fan)應(yīng)??(ying)??。??　　B細(xì)??(xi)胞?(bao)作??(zuo)為??(wei)“抗??(kang)體??(ti)工??(gong)廠??(chang)”??，能??(neng)針??(zhen)對(duì)??(dui)不??(bu)同??(tong)病??(bing)原??(yuan)體??(ti)定??(ding)制?(zhi)特??(te)異??(yi)性??(xing)抗??(kang)體??(ti)??，通??(tong)過(guò)??(guo)中??(zhong)和?(he)病??(bing)毒??(du)或??(huo)標(biāo)??(biao)記??(ji)病??(bing)原??(yuan)體??(ti)協(xié)??(xie)助??(zhu)清??(qing)除??(chu)機(jī)??(ji)制??(zhi)；同??(tong)時(shí)??(shi)分??(fen)化??(hua)出??(chu)的??(de)記??(ji)憶??(yi)B細(xì)??(xi)胞??(bao)可??(ke)在??(zai)免??(mian)疫??(yi)結(jié)??(jie)束??(shu)后??(hou)保??(bao)留??(liu)抗??(kang)體??(ti)“圖??(tu)譜??(pu)”??，實(shí)??(shi)現(xiàn)??(xian)快??(kuai)速??(su)二??(er)次??(ci)應(yīng)??(ying)答??(da)??。??PZDHJGNQXMqibao666888　　xian ??(xian)tian ??(tian)xing ??(xing)mian ??(mian)yi ??(yi)shi ??(shi)ren ??(ren)lei ??(lei)yu ??(yu)sheng ?(sheng)ju ??(ju)lai ??(lai)de ?(de)fang ??(fang)yu ??(yu)xi ??(xi)tong ??(tong)??，ru ??(ru)tong ??(tong)cheng ??(cheng)bao ??(bao)de ??(de)di ??(di)yi ??(yi)dao ??(dao)cheng ??(cheng)qiang ??(qiang)he ??(he)xun ??(xun)luo ??(luo)wei ??(wei)bing ??(bing)??，neng ??(neng)zai ??(zai)bing ??(bing)yuan ??(yuan)ti ??(ti)ru ??(ru)qin ??(qin)shi ??(shi)xun ??(xun)su ??(su)fan ??(fan)ying ??(ying)??。??　　Bxi ??(xi)bao ?(bao)zuo ??(zuo)wei ??(wei)“kang ??(kang)ti ??(ti)gong ??(gong)chang ??(chang)”??，neng ??(neng)zhen ??(zhen)dui ??(dui)bu ??(bu)tong ??(tong)bing ??(bing)yuan ??(yuan)ti ??(ti)ding ??(ding)zhi ?(zhi)te ??(te)yi ??(yi)xing ??(xing)kang ??(kang)ti ??(ti)??，tong ??(tong)guo ??(guo)zhong ??(zhong)he ?(he)bing ??(bing)du ??(du)huo ??(huo)biao ??(biao)ji ??(ji)bing ??(bing)yuan ??(yuan)ti ??(ti)xie ??(xie)zhu ??(zhu)qing ??(qing)chu ??(chu)ji ??(ji)zhi ??(zhi)；tong ??(tong)shi ??(shi)fen ??(fen)hua ??(hua)chu ??(chu)de ??(de)ji ??(ji)yi ??(yi)Bxi ??(xi)bao ??(bao)ke ??(ke)zai ??(zai)mian ??(mian)yi ??(yi)jie ??(jie)shu ??(shu)hou ??(hou)bao ??(bao)liu ??(liu)kang ??(kang)ti ??(ti)“tu ??(tu)pu ??(pu)”??，shi ??(shi)xian ??(xian)kuai ??(kuai)su ??(su)er ??(er)ci ??(ci)ying ??(ying)da ??(da)??。??