2022英语周报高二总第3613期答案

25.解析:(1)步驟①中海绵铜与硝酸铵、水、硫酸反应,醵性条件下硝酸根离子具有氧化性,将铜元素氧化成铜离子,氧化产物只有一种,则为C51。(2)步骤③的反应为2Cu2++S0+2C1+H2(=2(u(1↓+S01+2H。(3)由流程可知,经酸洗、水洗后得到硫跋铁,则应加入硫酸,为防止Cu(1溶解,不能加入硝酸等氧化性酸,也不能加入盐酸,防止引入新杂质。(4)Cu(C1难溶于醇和水,可溶于氧离子浓度较大的体系,在潮湿空气中易水解氧化,步骤⑥洗,步骤⑦烘干,故目的是使(uCl千燥,防止其水解氧化。(5)硒代硫酸钠ScS0))与H2S发生的反应为2c().4Na2S)1+S+SO2↑+11).(6)流程化生产化亚铜的过程中,温度过低反应率慢,((1产率低;溫度过高、pH过大,容易向u)和(u2O)转化,且温度过高,铵盐(氯化铵、亚硫酸铵)易受热分解答案:(14分,每空2分)(I)CuSO,(2)2(u2++01-+2C1+H20-2CuC;+s0x+2H(3)硫酸(4)使CuC1干燥,防止其水解氧化:N- SeSO, +H SO,--Naz SO.+ Se ,+502+H2O6)温度过低反应速率慢温度过高、pH过大,容易向Cu()和Cu2O转化,且温度过高铵盐(氯化铵、亚硫酸铵)易受热分解(任答一点即可)

第二节书面表达One possible version:Dear friendsHow lucky we are under our parents' wings! However, we'll finally grow up someday. leaving ourparents and facing life challenges alone. To cope with the problems that come our way in the future, weshould develop good working habits and improve our life skillBut how to make i: Trying to do some chores at home is of great bereft: We can master one or twolife skills every year. These skills can include cooking, washing our own clothes and tidying our roomsMeanwhile, we might as well participate in some act ivities that give us real-world work experience.Let's respect work, work harder and he well equipped for our future lifeStudents' Ur本篇书面表达要求写一封倡议书,属于应用文。解题步骤]1.审悶立意:本篇书面表达属于应用文,要求考生写一封倡议书。应使用第一人称,时态用一股现在时2.溟篇冇局:倡议书格式文中已经給出。首段表述倡议同学们爱劳动、培养生活技能的原因和目的,中间段提出倡议的具体内容,最后一段发出倡议。3.关键词和句子:根据写作要点及构思好的提纲我们可以初步确定文章可能使用到的词汇、短语和句fE: under our parents' wings/however/ grow up someday/ face life challenges/ cope with/ come our way/in the future/develop working habits/improve life skills/make it/do some chores / of great henefit/master/tidy/ meanwhile/ might as well do sth. participate In/ be well equipped for,感叹句/非谓语动词作状语/定语从句等。通过词汇铺垫,我们就很容易成文了。文章写完之后要检查文中是否存在拼写或语法错误,并增加一些细节和过渡性的词汇,使全文衔接自然,语义流畅。[点睛]本文语言简练,详略得当,内容完整,同时使用了高级词汇表达和高级句子。高级词汇表达: under ourparents' wings/face life challenges/cope with/come our way/develop working habits/make it/do somechores/of great benefit/master/tidy/meanwhile/might as well do sth/participate in/be well equippedfor等高级句式: How lucky we are under our parents' wings!/ However, we'll finally grow up someday,leaving our parents and facing life challerges alone. /To cope with the problems that come our way in thefuture, we should develop good working habits and improve our life skills /Meanwhile, we might as wellparticipate in some activities that give us real- world work experience.另外,本文注重了语言的交流性与真实性,触动心灵,体现了语言的情感美、真实美。评分标准

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