2023江西省九江一模理数答案

26.B【解析】精子和卵细胞能够结合,与其细胞膜表而糖蛋白的识别作用有关,体现了细胞膜具有细胞信息交流的功能和流动性的结构特点,A项锴误;精细胞需经变形过程才能成为精子,从而保证受精作用的歟利完成.B项正确;雌亂子和雄配子的数量不相等.顶锴误:基因重组是减数分裂过程中非等位基肉的自由组合和同源染色体的交叉互换,受精作用没有发生基因重组,D项错误。

15.B【解析】该图若表示减数分裂,则cd段可表示减数第一次分裂过程和减数第二次分裂前期、中期,其屮减数第二次分裂前期和中期的细胞中不存在同源染色体,交叉互换发生在减数第一次分裂的前期,即cd段,∧项错误、B项正确;有丝分裂时,纺锤体出现在前期,即cd段,de段着丝点分裂,染色体数目加倍.C项错误;该图若表示有丝分裂,则ef段的细胞可表示有丝分裂后期和末期,而后期染色体数目和核DNA数月均为92,D项错误

【写作提示】1.审题:(1)明确故事人物:本故事中主要人物为柯斯迪和亨利;(2)厘清主要事件:柯斯迪的母亲与亨利的父亲重组了家庭,然而柯斯迪却有些难以接受。在一次舞台演出中,柯斯迪的戏服出了问题,裙子滑落,她在观众面前出糗,此时亨利及时帮助了她。2.写作要点:(1)亨利帮助柯斯迪将束带系好后,演出顺利进行;(2)柯斯迪在演出结束后向亨利真诚道谢,发自内心地接纳了亨利。【参考范文】Then Henry, beside Kirstie, came to her aid. He fixed her costumetying a fancy knot in the drawstring. To distract the audience's attention,he even made a joke about Kirstie, s "not"knowing knots, which madethe audience laugh again. But this time, the laugh felt good. Thanks toHenry's great help, Kirstie got through the rest of the play with delight andpassion, singing at all the right times. At the sight of joy and excitement onthe audience' s faces, she smiled brilliantly, lighting up the hallAfter the performers bowed and moved offstage, Kirstie, still inexcitement, began to search for her family in the crowd. Then in thecrowd, Kirstie saw her mother wink at her and her stepfather give her a-up. Finally, she found Henry and tapped hirshoulder. Kindly, she smiled at him and said, " Thanks for, youknow.""No problem, "Henry replied with his smile. Kirstie thoughtto herself that her mom was right about kindness and maybe it wasn't sobad to have a new person in her corner of the world after all【点评】该范文围绕原文内容进行了非常合理的续写,紧扣语境,逻辑紧密,详略得当。第一段紧扣所给开头语中的提示信息,讲述了亨利在柯斯迪遇到窘况时及时利用自己的打结技巧帮助了她,并利用笑话转移观众的注意力,从而使柯斯迪全心投入到演出中;第二段则紧承第一段内容,讲述了柯斯迪成功演出后真诚地向亨利道谢,并接纳亨利成为自己的家人。以上内容既合理地对故事情节进行了延续,尤其是亨利懂得如何打结并在柯斯迪遇到困难时伸出援助之手,又把柯斯迪妈妈所说的做善良的事融入故事中,柯斯迪深受感动之余,也打开了心结,从此接纳这个重组的新家庭,续写将整个故事带入到一个十分感人的情境中。范文中不乏较为高级的表达,如 distract one,'s attention, thanks to one' s greathelp, with delight and passion, at the sight of, light up等高级短语以及现在分词短语作状语、 which引导的非限制性定语从句、"it+be+d+todo.."等句式,使得文章语言表达丰富优美

I still remember that cold day when Chris and I go短文改错i skating on a lake, While enjoying ourselves, I suddenly no-ticed something unusual. The ice broke andat- the mment I warned Chris to take care, he slipped into the lake. Iwas too frightening to know what to do. I cried for helpanxious.Hearing my cries, a young man rushed over,frightenedjump into the lake to save Chris. At last, he was out ofanxiouslyhe water but we immediately sent him to the nearest hospiandtal. After A short while, Chris' parents arrived. They ex-ssed their thank to the young man.respectable man!①go改为went。动词时态误用。根据该句中的“ that coldday”可知,该处陈述的是过去发生的事情,故用一般过去时② ourselves改为 myself。反身代词误用。根据主句的主语I可知,该处表示“当我正玩得痛快时”,故用 myself。③删除the前的at。介词多用。 the moment在该处为表时间的从属连词,单独使用,不与介词at连用,故删除at④ frightening改为 frightened,形客词混用。根据该句主语I可知,该处应用形容词 frightened,表示“客怕的”,修饰人frightening意为“令人害怕的”,一般修饰事物。⑤ anxious改为 anxiously,形容词和副词混用。该处修饰动词cry,应用 anxIous的副词形式 anxiously⑥jump改为 Jumping。非谓语动词误用。分析该句结构可知,该处作伴随状语,主语 a young man和动词jump之间为逻辑上的主谓关系,故用现在分词形式。⑦but改为and。连词误用。根据语境可知,“将 Chris教出水面”与“我们立即把他送往最近的医院”之间为顺承关系,故应将but改为and③在shor前加a。冠词漏用。 a short while为固定搭配,意为“片刻”。③ thank改为 thanks。名词的单复数误用。根据该句中的their和语境可知,该处表示表达他们的感激,应用名词的复:数形式 thank:01ow改为Wa,感叹句引导词误用,此处是一个感叹句,引导词修饰名词短语“ a respectable man”,应用What。书面表达