2022英语周报高一外研 34答案

【短文改错】The summer holiday is coming, which makes me so exciI am looking forward to it. My parentsonce plan to travel to Britain in order to improve my English but experience the local culture. Butdue to the epidemic, we've decided not to travel te abroad. Instead, we have planned to relax locallyswim for 2 hours every day. On the weekendwill goI want to join the swimming club and goclimbing with my parents and watch any of my favorite films. Also, I can go to/ countryside todraw with some classmate. I will have a happy and rich summer vacation which is differently from theclassmatesprevious years文章介绍了作者的暑假计划。作者全家本来打算去英国度假,但由于疫情,放弃了这一计划,而是改为在国内安排活动。① exciting改为 excited考查非谓语动词。此处 excited是过去分词,用作宾补,与句子宾语是被动关系②plm改为 planned考查动词时态。此处应该用一般过去式,由前面的once得出。③but改为and考查并列连词。此处为了提高我的英语水平去英国旅游和体验当地文化是承顺关系。④去掉to考查介词。此处 abroad是副词, travel abroad的意思是“出国旅行⑤swim改为 swimming考查非谓语动词。此处 swimming是动词ng形式, go swimming的意思是“去游泳”。⑥we改为I考查人称代词。此处I指的是作者自己。句意:我将和我的父母去爬山,看一些我最喜欢的电影。⑦any改为some考查不定代词。any常常用于否定句或疑问句,ome可用于肯定句,表示肯定的含义。⑧ countryside前加the考查冠词。此处 the countryside是固定用法,意思是“乡村classmate改为 classmates考查名词复数。此处应该用名词的复数形式,由前面的some得出。⑩ differently改为 different考查词性转换。此处 different是形容词用作表语。

(1)无明显现象(2分)有白色沉淀(2分)(2)SO溶于水生成HSO(2分)3B2++3S0+2NO+2H2O3B2S0++2No+4H+(或3B2-+9+2NG=8B80￥+4H”+2No↑+(3)以实验1作为参照实验进行实验3;将纯净的SO体缓馒适入未经脱O处理的25mL021mol·L1Bagk溶液中若有白色沉淀生成,证明假设二成立,否则假设二不成立(2分其他合理答案也给分)于(1分)O1与H2SO3反应的离子方程式为sO2+O2-4H++2S0,NO与H2SO2反应的离子方程式为3H2SO3+2NO一3s0-+4H++2NO↑+H2O,则足量的O2和NO分别氧化相同的HSO3,生成H+的物质的量前者多于后者(2分,其他合理答案也给分)【解析】(1)可通过实验1未生成白色沉淀,而实验2生成白色沉淀来证明假设一正确(2)SO2溶于水得到中强酸HSO3,使得溶液的pH减小;实验2中,NO将SO2氧化为SO-,自身被还原为NO,同时有H+生成,故溶液pH减小。(3)在验证假设二时,应使用不含NO的钡盐,如BaCl2溶液,可向含有O2的BaCl2溶液中缓慢通入SO2,若有白色沉淀生成,则证明假设二成立。(4)O2与H2SO3反应的离子方程式为2H1SO2+O24H++2S0-,NO与H2SO反应的离子方程式为3H2SO+2NO一30+4H++2NO↑+H2O,则足量的O2和NO3分别氧化相同的H2SO,生成H+的物质的量前者多于后者,故两溶液的pH前者小于后者

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