• 章节目录

小说简介

yiwanjiededoushishenghuoticaixiaoshuo《gaokaoheikeji:wodejietisiluzhenhanquanqiu》shi“zack00”deqingxinzhizuo,shuzhongzhurengongshiqinfenggaoyuan,xiaoshuogushijianshushi:∣pm∣⋅∣pn∣=∣−12−1(23)+12∣⋅2=∣−12−23+1∣⋅2=∣−3+4−66∣⋅2……

精彩章节

jiangtaishang,qinfengshouzhibanjiebaisefenbi,jingjingdizhulizaijudadeheibanqian。

yangguangtouguochuangling,zaitaqingshouquetingbadeshenyingshangtouxiayipianbanbodeguangyun,kongqizhong,xixiaodefenbichenaizaiguangzhuzhongfeiwu,rutongwushuweisuodexingchen。

zhenggegaosan(qi)ban,cikexianruleyizhongjinhuninggudesiji。

suoyourendemuguang,dourutongbeicishixiyindetiexie,laolaodidingzaiqinfengdeshenshang,yijitamianqianneidaokancheng“diyuji”nandudetuoyuanzonghedatishang。

xianqianneixiexingzailehuodeqiexiao、qingmiedeyilun、yijikanhaoxideyanshen,cikedouyiqiaoranyinqu,querdaizhide,shiyizhonghunzazhenanyizhixin、qiangliehaoqiyijiyisisimomingchengzhiwei“qidai”defuzaqingxu。

tamenshizaiwufalijie,zheigepingrililianjigexiandoumobudaode“zhumingxuezha”,jiujingshinalilaideyongqi,ganzaishuxuelaoshigaoyuandeshengnuyuquanbantongxuedezhushixia,rucicongrongbupodizoushangjiangtai,qutiaozhanyidaolianbanjidingjianxuebadouwangershengweidetimu?

nandaotazhendefengle?haishishuo,tayinzangleshenmebuweirenzhidemimi?

gaoyuanshuangshouhuanbaozaixiongqian,xieyizaijiangtaibianyuan,zuijiaoqinzheyimobinglengdejiqiao。tadaoyaokankan,zheigebuzhitiangaodihoudeqinfeng,jiujingnengzaizheidaotimumianqianchengduojiu!tashenzhiyijingxianghaole,dengqinfengzaiheibanqianzhuaernaosai、choutaibaichuzhihou,zijigairuheyongzuijiansuankebodeyuyan,jiangtaneikexiaode“zixin”chediniansui,rangtamingbaishenmejiaozuozhenzhengdejuewang!

qinfengmeiyoulihuizhouzaodeyiqie。

tadexinshen,yijingwanquanchenjinzaileyanqiandezheidaotimuzhizhong。

naohaizhong,“xueshenheikejixitong”defuzhugongnengyiqiaoranqidong。

【ding!jiancedaosuzhumianlingaonanduxueshutiaozhan,xitongfuzhumokuaiyijihuo。】

【“chujishuxuesiwei(suipian)”xiaoguozengqiang,luojituiyansudutisheng50%,fuzaxinxichulinenglitisheng30%!】

【zhengzaiduidangqiantimujinxingduoweidujiexi……jiexiwanbi!yiweisuzhushaixuanchuzuiyoujietilujingsantiao,qingsuzhuzixingxuanze。】

binglengerjixiedexitongtishiyin,rutongzuijingzhundedaohang,zaiqinfengdeyishishenchuxiangqi。

chaneijian,neidaoyuanbenzaitayanzhongyijiuxiandeyouxiepangencuojie、miwuzhongzhongdetuoyuandati,fangfobeiyizhiwuxingdedashoubokailecengcengmiwu,luchuleqineizaiqingxideluojimailuo。

gezhongxiangguandedingyi、dingli、gongshi、fuzhuxianzuofa、yijibutongjietisiludeyoulie,rutongchaoshuibanyongrutadenaohai,bingbeixunsuzhenghe、fenxi、youhua。

“yuanlairuci……”qinfengdeyanmoushenchu,shanguoyisilerandejingguang。

tashenxiyikouqi,ganshouzhedanaoqiansuoweiyoudeqingmingyuhuoyue,yijineiguyuanyu“chujishuxuesiwei”suipiande、duishuxuewentibenzhideminruidongchali。

然后,他动了。

shouzhongdefenbi,zaisuoyourendezhushixia,wenwendiluozaileheibandezuoshangjiao。

“唰——”

qingcuidemocashengxiangqi,dapolejiaoshineidesiji。

解:

yigeqingxieryoulide“jie”zi,rutongdianjingzhibi,shunjianxiyinlesuoyourendemuguang。

jinjiezhe,qinfengdebijiankaishizaiheibanshangfeiwuqilai。

(1)youtiyizhi,e=ca=22e=\frac{c}{a}=\frac{\sqrt{2}}{2}e=ac=22,zea2=2c2a^2=2c^2a2=2c2

youyinweia2=b2+c2a^2=b^2+c^2a2=b2+c2,suoyi$2c^2=b^2+c^2......zhixianpf2dexielv,zhixianpf₂dexielv,zhixianpf2dexielvk_{pf_2}=\frac{y}{x-c}。youk_{pf_1}\cdotk_{pf_2}=-\frac{1}{2},de,de,de\frac{y^2}{(x+c)(x-c)}=-\frac{1}{2},ji\frac{y^2}{x^2-c^2}=-\frac{1}{2}。yinweidianp(x,y)zaituoyuanshang,suoyi。yinweidianp(x,y)zaituoyuanshang,suoyi。yinweidianp(x,y)zaituoyuanshang,suoyi\frac{x^2}{a^2}+\frac{y^2}{b^2}=1,ji,ji,jiy^2=b^2(1-\frac{x^2}{a^2})。dairushangshi,bingjiehe。

dairushangshi,bingjiehe。dairushangshi,bingjieheb^2=c^2jijijia^2=2c^2de:\frac{c^2(1-\frac{x^2}{2c^2})}{x^2-c^2}=-\frac{1}{2}\frac{c^2-\frac{x^2}{2}}{x^2-c^2}=-\frac{1}{2}2(c^2-\frac{x^2}{2})=-(x^2-c^2)2c^2-x^2=-x^2+c^22c^2=c^2$

“ng?”qinfengxiedaozheili,meitouweiweiyicu。zheigejieguoxianranshicuowude。

taixia,gaoyuanzuijiaodejiqiaogengnongle:“zenme?zheijiukazhule?kanlai‘dashuxuejia’deshuipingyebuguorucima!”

yixietongxueyerenbuzhufachuledididechixiaosheng。

qinfengquehuangruoweiwen,tadedanaozaifeisuyunzhuan。xitongsuiranjichulezuiyoulujing,danjutidetuidaohejisuan,yiranxuyaotazijiwancheng。gangcaidetuidaoguochengzhong,xianranyouyigexijiebeitahulvele,huozheshuo,xitongjichude“xielvzhiji”zheigetiaojian,kenengyougengjianjiedeyingyongfangshi。

“dianpzaituoyuanshang,xielvzhiji……tuoyuandedierdingyi?

budui……dengdeng,y2=−12(x2−c2)y^2=-\frac{1}{2}(x^2-c^2)y2=−21(x2−c2),zheigexingshi……”

qinfengdemuguangzaicisaoguotimutiaojian,naohaizhonglingguangyishan!

“我明白了!”

taxunsucadiaolegangcaituidaocuowudebufen,fenbijianzaicidianxiangheiban。

youkpf1-kpf2=−b2a2k_{pf_1}\cdotk_{pf_2}=-\frac{b^2}{a^2}kpf1⋅kpf2=−a**2shituoyuandeyigeguyouxingzhi(dangjiaodianzaixzhoushangshi,duiyufeidingdianp,qiyuliangjiaodianlianxianxielvzhijiweichangshu−b2a2-\frac{b^2}{a^2}−a**2)。

yinci,−b2a2=−12-\frac{b^2}{a^2}=-\frac{1}{2}−a**2=−21,jia2=**2a^2=**^2a2=**2。

......

suoyi,tuoyuancdebiaozhunfangchengwei:x22+y2=1\frac{x^2}{2}+y^2=12x2+y2=1

行云流水!

dangqinfengxiexiatuoyuanbiaozhunfangchengdeneiyike,taixianeixieyuanbenzhunbeikanxiaohuadetongxue,lianshangdebiaoqingdouweiweiyijiang。

suirandiyiwenxiangduijiandan,danqinfenggangcaineiduanzandetingdun、xunsudejiucuo、yijizuihouneiju“tuoyuandeguyouxingzhi”,douxianshichutaduituoyuanzhishidiandezhangwo,sihu……bingmeiyoutamenxiangxiangzhongneimebukan?

youqishineiju“guyouxingzhi”,henduotongxueshenzhidoumeitingshuoguo,huozhezhishizaimouxiecankaoshudejiaoluolijianguo,genbenmeidanghuishi!

gaoyuanyeshiweiweiyizheng,tameixiangdaoqinfengjingranzhidaozheigexiangduilengpidexingzhi。buguo,tahenkuaibianhuifulezhending,xinzhonglengxiao:“heng,waidazhengzhebale!diyiwensuannimenghunguoguan,wokannidierwen、disanwenzenmeban!”

qinfengmeiyoulihuitaixiadefanying,tadezhuyiligaodujizhong,fenbihaobutingxiedizhuanxiangledierwen。

(2)you(1)zhif1(−1,0),f2(1,0)f_1(-1,0),f_2(1,0)f1(−1,0),f2(1,0)。shezhixianldefangchengweix=my+1x=my+1x=my+1(dangzhixianlxielvkcunzaishi,m=1km=\frac{1}{k}m=k1;dangkbucunzaishi,zhixianlweix=1x=1x=1,yutuoyuanjiaoyu(1,±22)(1,\pm\frac{\sqrt{2}}{2})(1,±22),cishiabzhongdianwei(1,0)(1,0)(1,0)jif₂,zhijing∣ab∣=2|ab|=\sqrt{2}∣ab∣=2,yuanxinweif₂,xianranbuguof₁,gukcunzaiqiebuwei0)。

jiangx=my+1x=my+1x=my+1dairutuoyuanfangchengx22+y2=1\frac{x^2}{2}+y^2=12x2+y2=1de:

......

shea(xa,ya),b(xb,yb)a(x_a,y_a),b(x_b,y_b)a(xa,ya),b(xb,yb),zeya+yb=−2mm2+2y_a+y_b=-\frac{2m}{m^2+2}ya+yb=−m2+22m,yayb=−1m2+2y_ay_b=-\frac{1}{m^2+2}yayb=−m2+21。

yinweiyiabweizhijingdeyuanguodianf₁,suoyif1a⃗⋅f1b⃗=0\vec{f_1a}\cdot\vec{f_1b}=0f1a⋅f1b=0.

......

dairuweidadinglidebiaodashi:

(m2+1)(−1m2+2)+2m(−2mm2+2)+4=0(m^2+1)(-\frac{1}{m^2+2})+2m(-\frac{2m}{m^2+2})+4=0(m2+1)(−m2+21)+2m(−m2+22m)+4=0

......

suoyim=±7m=\pm\sqrt{7}m=±7

zezhixianldexielvk=1m=±17=±77k=\frac{1}{m}=\pm\frac{1}{\sqrt{7}}=\pm\frac{\sqrt{7}}{7}k=m1=±71=±77

“唰唰唰——”

fenbizaiheibanshanghuaguo,liuxiayixingxingqingxi、gongzheng、luojiyanmidetuiyanbuzhou。

qinfengdedongzuomeiyousihaodetingdun,fangfozheixiefuzadejisuanhetuidao,zaoyijingzaitanaohaizhongyanlianleqianbaibian。

tadesiluzhiqingxi,buzhouzhijianlian,suduzhikuaijie,yijingrangtaixiasuoyoudexueshengdoukandemudengkoudai!

neixieyuanbenhaidaizheyisiqingmiehehuaiyideyanshen,cikeyijingwanquanbeizhenjingsuoqudai!

“**!zhei……zheizhendeshiqinfengzaijieti?”

“tadesuduyetaikuaileba!erqiemeiyibudouhaoxiangmeiyoujingguosikaoyiyang,zhijiejiuxiechulaile!”

“dierwendejisuanliangzheimeda,tajingranyidiandoumeikaqiao?zheibukexuea!”

“nimenkantadebuzhou,yongxiangliangfachuliyuanguof₁detiaojian,silufeichangqingxi,biwomenpingshixiangdeneixieyingsuanyaojianjieduole!”

jiulianbanjilineijigezixuweixuebadexuesheng,cikeyeshimianmianxiangqu,congbicideyanzhongkandaoleyimonanyizhixindehairan。

tamenmenxinziwen,jiusuanbazheidaotijiaojitamenlaizuo,yejueduibukenengdadaoqinfengzheizhongjuzhongruoqing、xingyunliushuibandejingjie!

gaoyuanlianshangdejiqiaozaoyixiaoshidewuyingwuzong,querdaizhide,shiyizhongjianleguibandecuoeyudaizhi。

tadezuibaweiweizhangzhe,houjiebuzijuedishangxiahuadongleyixia,sihuxiangshuoxieshenme,quefaxianzijiyigeziyefabuchulai。

zhei……zheizenmekeneng?!

zheigeqinfeng,bushineigelianzuijichudetuoyuandingyidougaobuqingchudexuezhama?

tazenmekenengzairuciduandeshijiannei,ruciwanmeidijiechuzheidaotidedierwen?

nandao……tazhiqianyizhidouzaizangzhuo?

bu!bukeneng!gaoyuanlikefoudinglezheigehuangmiudexiangfa。tajiaoleqinfengliangnianduo,duitaneidiandizizaiqingchubuguole!

neizheidaodishizenmehuishi?!

gaoyuanganjuezijidedanaoyouxiedangji,yanqianfashengdeyiqie,yijingwanquanchaochuletaderenzhifanwei。

erqinfeng,duiyuzhouweineirutonghaixiaobanxiongyongdezhenjing,yijiuhuangruoweijue。

tadequanbuxinshen,douchenjinzaijietidelequzhizhong。

dangtaxiewandierwendedaan,fenbijianhaobutingxie,zhijiezhixiangleneinanduzuigao、yezuiweibiantaidedisanwen!

(3)you(2)zhi,zhixianldexielvk=77k=\frac{\sqrt{7}}{7}k=77(bufangquzhengzhi,lingyiqingkuangduicheng)。zem=7m=\sqrt{7}m=7

zhixianldefangchengweix=7y+1x=\sqrt{7}y+1x=7y+1

diana、bdezongzuobiaoshifangcheng((7)2+2)y2+27y−1=0((\sqrt{7})^2+2)y^2+2\sqrt{7}y-1=0((7)2+2)y2+27y−1=0ji$9y^2+2\sqrt{7}y-1=0delianggen。shedelianggen。shem(x_0,y_0),ze\frac{x_0^2}{2}+y_0^2=1。zhixianmadefangchengwei。zhixianmadefangchengwei。zhixianmadefangchengweiy-y_a=\frac{y_0-y_a}{x_0-x_a}(x-x_a)。ling。lingx=4,ze,ze,zey_s=y_a+\frac{y_0-y_a}{x_0-x_a}(4-x_a)。tongli,y_t=y_b+\frac{y_0-y_b}{x_0-x_b}(4-x_b)。yaoqiu|os|\cdot|ot|=|y_s|\cdot|y_t|$(yinweis,tzaizhixianx=4shang,oweiyuandian,suoyi|os|=|ys|,|ot|=|yt|,zheilijiashes,tzaiyzhoutongce,ruoyicezexukaolvzhengfu,danzuizhongjieguoyingweidingzhi,anshikenengcunzaimouzhongduichengxinghuozheqiaomiaodehuajianshidefuhaowentibeixiaochuhuozhejieguoweipingfangshu)。

kandaozheili,taixiadexueshengmenyijingchedimamule。

qinfengdejietisudu,yijingkuaidaorangtamenliankanqingtimuhegenshangsiludougandaochili!

youqishidisanwen,neifuzadeshedian、lianlifangcheng、yijiduizhixianjiaodianzuobiaodebiaoda,guangshikanzhejiurangrentouyunmuxuan。

danqinfeng,quexiederutongtannangquwubanqingsongqieyi!

tadefenbizaiheibanshangtiaoyue,liuxiayigegejingzhuneryouyadeshuxuefuhao。tadeshentiweiweiqianqing,shenqingzhuanzhuerningjing,fangfozhenggeshijiezhishengxiatayuzheidaotimu。

zheiyikedeqinfeng,shenshangsanfazheyizhongnanyiyanyudeqiyimeili。

neizhongduizhishidejizhizhangkong,neizhongmianduinantishidecongrongzixin,neizhongchenjinzailixingsiweizhongdeduteqizhi,rangsuoyourendougandaoleyizhongyuanzilinghunshenchudezhenhan!

“zhei……zheihaishiwomenrenshideneigeqinfengma?”yigenvshengnannanziyu,shengyinzhongchongmanlebukesiyi。

“ta……tajianzhijiuxiangshihuanleyigeren!bu,shihuanleyigenaozi!”

“nandaotabeishenmexueshenfutilebucheng?”

gaoyuanyijingchedishuobuchuhualaile。tadaidaidizhanzaineili,kanzheqinfengzaiheibanshangneirutongshenlaizhibibandeyansuan,ganjuezijideshijieguanzhengzaibeiyidiandiandidianfu、zhongsu。

tayinyiweiaodejiaoxuejingyan,talaiyishengcundezhuanyequanwei,zaiqinfengzheifeiyisuosidebiaoxianmianqian,xiandeshirucidecangbaiwuli。

heibanshangdetuiyanhaizaijixu。

qinfengdesilurutongtianmaxingkong,queyoushizhongbuliluojideguidao。taqiaomiaodiyunyongledianzaituoyuanshangdecanshufangchengshefa,jieheleqicihuadesixiang,yijiyixiekansilengpidanqueyichanggaoxiaodejihexingzhi。

neixieyuanbenkanqilaiwubifanzadedaishushi,zaitashouzhong,rutongbeishilemofayiban,yibubudihuafanweijian,liuanhuaming。

……(cichushenglvenbujingweitianren、huafuxiuweishenqidetuidaoguocheng,yinweizuozheyexiebuchulai,danqingduzhezixingnaobuqiniubizhichu)……

zuizhong,jingguoyixilielingrenyanhualiaoluanqueyouluojiyanjindetuiyan,kede:

ysyt=(1-y02)(4−xa)(4−xb)−(y0−ya)(y0−yb)(x0−xa)(x0−xb)yixiefuzadankexiaoxiangdezuhe(x0−xa)(x0−xb)y_sy_t=\frac{(1-y_0^2)(4-x_a)(4-x_b)-(y_0-y_a)(y_0-y_b)(x_0-x_a)(x_0-x_b)

liyongxa=7ya+1,xb=7yb+1x_a=\sqrt{7}y_a+1,x_b=\sqrt{7}y_b+1xa=7ya+1,xb=7yb+1yijix02/2+y02=1x_0^2/2+y_0^2=1x02/2+y02=1dengtiaojianjinxingdaihuanhehuajian

kaolvdaoduichengxinghedingzhiwenti,keyichangshixunzhaoteshudianm,huozheliyonggenggaojidesheyingjihezhishi(suirangaozhongbuyaoqiu,dansilukeyijiejian)

yigegengjianjiedesilukenengshiliyongdingbidianchafahuozheyinrucanshufangchenghouliyongduichengxing

jingguojiankuzhuojuedansiluqingxidehuajian,zuizhongkeyizhengming:

∣ysyt∣=yigebuhanx0,y0dechangshu|y_sy_t|=\text{yigebuhan}x_0,y_0\text{dechangshu}∣ysyt∣=yigebuhanx0,y0dechangshu

(cichuqinfengdeshijijiefakenenggengweiqiaomiaohezhijie,liruliyonglemouzhongbianhuanhuozheteshudejihejielun,shidejisuanliangdafudujiangdi,zhanxianchuchaoyuechangguigaozhongshengshuipingdeshuxuesuyang)

zuizhong,qinfengzaiheibanshangxiexialejielun:

cunzaichangshuλ\lambdaλ,shide∣os∣⋅∣ot∣=λ|os|\cdot|ot|=\lambda∣os∣⋅∣ot∣=λhengchengli

jingguojisuan(cichushenglvelejutidejisuanguocheng,danqinfengdebanshushangqingxidizhanshilemeiyigebuzhou),kede:

λ=499\lambda=\frac{49}{9}λ=949。(cishuzhiweishili,shijiyinggenjutimuyanjintuidao)

“啪嗒。”

zuihouyibiluoxia,qinfengshouzhongdefenbiyeyinweiyonglierduanchengleliangjie,diaoluozaidishang,fachuleyishengqingweidecuixiang。

danzheishengqingxiang,querutongjingleiban,zaisijidejiaoshizhongzhaxiang!

qinfenghuanhuandizhuanguoshen,etoushangshenzheximidehanzhu,xiongtangyinweigangcaigaodujizhongdesikaoerweiweiqifu,dantadeyanshen,queyijiuqingcheermingliang,daizheyisijietihoudeshiranyudandandexiaoyi。

tapingjingdikanleyiyantaixianeixierutongbeishiledingshenfaban,yigegezhangdazuiba、dengyuanyanjing、manliandaizhidetongxue,zuihou,jiangmuguangtouxiangletongyangchuyushihuazhuangtaideshuxuelaoshigaoyuan。

“laoshi,zheidaoti,wojiewanle。”

tadeshengyinbugao,querutonghongzhongdalv,zaimeiyigerendeerbianhongranzuoxiang!

技惊四座!

zheiyike,zhenggegaosan(qi)ban,yaquewusheng!

suoyourendoubeiqinfengzheikanchengshenjibandebiaoxian,chedizhenshezhule!

neixingyunliushuibandejietiguocheng!

neiqingxiwubideluojisilu!

neikuaidaolingrenfazhideyansuansudu!

yijineizuizhongxiezaiheibanshangde、kanchengwanmeidedaan!

zheiyiqiedeyiqie,dourutongzuifenglidekedao,shenshendimingkezailemeiyigerendenaohaizhizhong,rangtamenyongshengnanwang!

gaoyuandaidaidikanzheheibanshangneimimimamaqueyoutiaoliqingxidetuiyanbuzhou,youkanlekanmianqianzheigeshenqingdanran、fangfozhishizuoleyijianweibuzudaoxiaoshideqinfeng,ganjuezijidehoulongxiangshibeishenmedongxiduzhule,yigeziyeshuobuchulai。

tadedanaoyipiankongbai,xinzhongzhishengxiawujindezhenhanyu……nanyizhixin!

zhei……zheizhendeshineigetayinxiangzhongwukejiuyaodexuezhaqinfengma?!

zheijiefa……zheisilu……zheisudu……

简直……太完美了!

wanmeidaorangtazheigejinyinshuxuejiaoxueshijiniandelaojiaoshi,dougandaozikuiburu!

tashenzhicongqinfengdejietibuzhouzhong,kandaoleyixietazijidouweicengxiangdaodeqiaomiaozhichu,yixiegengjianjie、genggaoxiaodechulifangfa!

zheiyike,gaoyuanganjuezijidelianjia**lade,xiangshibeirenhenhendichoulejishigeerguang!

tazhiqiandeneixiejifeng、neixiediaonan、neixieziyiweishideyouyuegan,zaicikeqinfengneinianyaxingdeshilimianqian,douxiandeshirucidekexiao,rucidebukanyiji!

“咕咚。”

buzhidaoshishei,jiannandiyanleyikoutuomo,dapolejiaoshineidesiji。

jinjiezhe,rutongliansuofanyingyiban,ciqibifudedaoxiliangqisheng、nanyizhixindejinghusheng、yijiyayibuzhudeyilunsheng,rutongchaoshuibanxiongyongerqi,shunjianyanmeilezhenggejiaoshi!

“tiana!wokandaoleshenme?qinfeng……qinfengtajingranzhendebazheidaotijiechulaile?!”

“erqie……erqiejiedezheimekuai!zheimewanmei!woliantimudoumeiwanquankanmingbaia!”

“zhei……zheibukeneng!zheijueduibukeneng!takendingshizuobile!huozhe……huozhetatiqiannadaotimule?”

“fangpi!gaolaotougangxiedetimu,tashangnaertiqiannaqu?erqienikantaneijietibuzhou,yiqihecheng,genbenbuxiangshibeide!”

“taiqiangle!zheizhendeshiqinfengma?tashenmeshihoubiandezheimeniubile?!”

banhuasuxiaoyueneishuangmeilidemouzili,yicailianlian,tajinjindiwuzhezijidexiaozui,shengpazijihuirenbuzhujinghuchusheng。takanzhejiangtaishangneigezaiyangguangxiafangfosanfazhedandanguangmangdeshaonian,xinzhongchongmanleqiansuoweiyoudezhenhanyuhaoqi。

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erzhei,jinjinzhishiyigekaishi!

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