23.(16分每空2分1)核糖体;RNA聚合(或RNA复制):受体;细胞膜具有一定的流动性〉基因工程含有s蛋白的腺病毒侵入人体后刺激免疫系统产生了针对新冠病毒(或S蛋白》的相应记忆B细胞和记3)体内产生了特异性抗体和相应的记忆细胞一是新型冠状病毒容易发生变异,二是特定疫苗(抗原〉引起的特异性免疫产生的抗体只能对特定的病原体起作用【解析】(1)据题意分析,该酶完成病毒遗传物质〈RNA)的复制,说明该酶是RNA聚合酶(RNA复制酶其化学本质为蛋白质,因此新型冠状病毒的基因组RNA可直接作为模板,利用宿主细胞的核糖体合成病毒的RNA聚合酶〈RNA复制酶〉。新型冠状病毒的囊膜蛋白“s”可以和宿」细胞膜上的受体相结合,进一步介导病毒囊膜与细胞臆融合。病毒囊膜能够与细胞臆融合的原因是细胞膜具有一定的流动性2)将新冠病毒的s蛋白基因整合到腺病毒的基因组上属于基因工程的技术手段。抗原刺激人体免疫系统产生相应的记忆细胞,从而对抗原产生较长时间的免疫效果接种新型冠状病毒疫苗后,机体可以产生相应的记忆细胞和特异性抗体,故可以预防新型肺于新型冠状病毒容易发生变异,且特定疫苗〈抗原〉引起的特异性免疫产生的抗体只能对特定的病原体起作用,故人接种新型冠状病毒疫苗后仍然有可能再患肺炎

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

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