第二节读后续写【写作指导】◆文章主线已知线索:Surfer被送到了“我”家经营的动物收养所一父亲在宠物收养网站上刊登 Surfer的信息— Parker一家要领养 Surfer-7oey是一只没有人愿意领养的狗狗—7oey被以前的主人伤害过—刚来到动物收养所时,Zoey对“我们”充满敌意—渐渐地 Zooey和“我们”建立了信任—7y喜欢和 Surfer待在一起Parker一家来了可续写线索Surfer和Zooe依依不舍?“我们”和 Parker一家不忍看它们离别?父亲把Zoy的故事讲给 Parker一家听? Parker一家收养 Zooey?两只狗狗和“我们”都非常开心?◆续写词汇已给提示词汇:Surfer, home, a loving family, responsible, Zooey,adopt, treated, barked, trusted, the Parkers续写可能用到的词汇:agreementOne possible versionParagraph 1When Surfer got tired, he wandered back to ZooLooey still wagged its tail lazily and sniffed around Surferwhile Surfer curled around Zooey, without any intention toeave with the Parkers. When it was time to leave Dadcalled Surfer gently and guided him to the Parkers'carHowever, Surfer followed Dad unwillingly, turning around togaze at Zooey. Meanwhile, Zooey rushed towards Surferbarking in sadness as if they would never meet again. TheParkers and our family all are unwilling to see this sceneDad told Zooey's story to Mr. and Mrs. Parker.Paragraph 2Mr. and Mrs. Parker asked if they could adopt ZooeyAre you sure?Dad asked. "Absolutely ! Mr Parkernodded. "She has been through a lot. I'd hate to separateher from her best friend. Hearing this, the children bothcracked into smiles. because they knew this was the bestending for the two dogs. Zd Surfer suddenly rushed toeach other and curled together as if they understood theagreement, with tails wagging crazily to show theirappSeeing the Parkers and two dogswerethrilled to find a loving family for them

20.【解析】(1)延长PF2,F1M相交于N点,连接OM,PK平分∠F1PF2,∵F1M⊥PK,∴|PNPF|M为F1N中点,…1分O为F1F2中点,M为F1N中点,(IPNPF2|)(PF1|-|PF2|1)=分又|PF1|+|PF2|=4所以|PF2PF|=号或|PF|=2PF2|=分又|F1F2|=2∴根据勾股定理,PF:⊥F1F2或PF2⊥F1F2所以△PF1F1的面积为×2×25分(2)设动点P(xo,y),由于P点异于A、B,故y≠0且x0≠士2由点P在椭圆上,故有+=1→y=3(4-x3)……6分又由(1)知A(-2,0),F2(1,0)所以直线AP的斜率kA又AP⊥F:Q,所以k·k2Q=-1→k2所以直线F2Q的方程:y=9分联立F2Q,l的方程得交点Q(-23(x0+2)所以PQ两点连线的斜率kn=—x+23(xo+2)yo(ro+2)-3(x。+2)将①式代入②式,并整理得:kn=-4ye………10分又PB两点连线的斜率km=2因为3(xo+2)3y,(ro+2)4 yo4y3y.(ro+2) yo3(4-x2)所以k=k,故P、Q、B三点共线.………12分

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