此可知，宋代宫廷樱戏题材画临川一中2022一2023学年度上学期期中考试A.反映出宋代经济的繁盛B.受到理学思想的影响高三年级历史试卷C.蕴含一定的教化作用D.表达了民众的心理需求6.元代《三国志话》中通过“大闹杏林庄”、“喝断当阳桥”、“怒鞭督邮”等故事把张飞塑造成一位草莽试卷总分：100分考试时间：100分钟出题人：彭树才审题人：孙健英雄、贴近普通百姓而不是高高在上的人物形象。这一人物形象塑造第I卷（选择题，共48分）A.寄托了文人的心理期待与诉求B.裘达了对社会黑暗腐朽的不满一、迭择题（本大题共24小题，每小题2分，共计48分，在列出的选项中，只有一项最符合题目要C.顺应了市民对世俗文化的需求D.宣扬了侠士兼济天下的价值观718世纪初，康熙皇帝决定任用传教士采用经纬度测量及三角测量法进行全国性实地测量，测绘人员分求。)赴全国各省，举凡天下山水城廊，均收入图中，即《皇與全览图》。康熙帝此举1.周惠王欲废长立幼，太子姬郑寻求齐桓公帮助。齐桓公率七国诸侯共同拥戴，姬郑顺利继位，即周襄A.体现了清朝文化政策开放包容B.加速了中国传统科技的转型王。后来周襄王还派代表参加了齐国组织的葵丘会盟。这反映出当时C.旨在推动西方科技在华传播D.适应了巩固大一统国家的需要A.嫡长子继承制得到巩固B.传统统治秩序遭到破坏8.民国学者蒋廷黻指出：“中国当初的目的全在禁烟…故鸦片战争的发生，非中、英两国所预料，更非C.诸侯征伐争霸现象普遍D.尊卑观念受到严重冲击两国所预谋。战争虽非偶然，然初不过因禁烟而起冲突，继则因冲突而起报复，终乃流为战争。”下列2.下图为西汉初年修建长安城的有关记录。观点与材料一致的是(惠帝元年)春正月，城（修建）长安。A.国人预料到禁烟会导致战争B禁烟运动是鸦片战争的诱因(悲帝)三年春，发长安六百里内男女十四万六千人城长安，三十日罢。C维护英国利益是战国爆发的主要原因D打开中国市场是战争爆发的根本原因(惠帝三年)六月，发诸侯王、列侯徒隶二万人城长安。9.甲午战争后，时人口称的“新书新报"作为“新学”的具体承载物。其关注度与传播度均有显著提升。(惠帝五年)春正月，复发长安六百里内男女十四万五千人城长安，三十日罢。与“旧书、旧学“旧党”成为两组互相对立的流行语汇。这反映出当时A.民族危机下知识分子的分化B.学西方成为社会共识(惠帝五年)九月，长安城成。-一据《汉书·惠帝纪》（说明：关中原冬季最冷在公历1月前后，均温在-5℃，西汉时还更冷一些。）C.教亡图存的探索进入到制度层面D.先进知识分子致力于中西文化融合10.1923年，中共中央发出通告：“吾党在此次国民党全国大会代表中，希望每省至少当选一人，望各从汉惠帝修建长安城的时间安排可知，当时区会与地方会预商当选之同志，此同志必须政治头脑明晰且有口才，方能在大会中纠正国民党旧的错误A.没有吸取茶朝灭亡的教训B.重视恢复和发展农业观念。”这反映了中共C.汉朝面临匈奴的严亚威胁D.诸侯对中央威胁加重A.强调建立统一战线紧迫蚀B.意识到武装起义的必要性3.关中地区水陆交通不甚便利，江淮米谷运转入都颇为困难，故隋唐两朝，当关中地区发生天灾，物产C.准备学握国民党领导权D.注重国共合作的独立性不足以供给帝王宫卫百官俸食之需时，“则帝王往往就食于洛阳”，逐渐相沿成例。这种现象折射出11.国内市场的商品结构表，据此可知，当时中国A.国家财政制度亟须改革B.政治中心东移至洛阳C.交通条件决定城市地位D.南方经济地位的提升4唐高宗时，商贾入仕为官的实例已见史乘，当时官阶较高者不多，参加科举考试者尚无一例。安史之19201936时间乱后，商人人仕人数猛增，入仕途径越来越广，且高官显要不乏其人。这反映出该时期商品A.商人政治地位得到提升B.政狩对商人依赖加强亿元%亿元C.官员队伍整体素养下降D.贱商轻商观念的淡化5北宋末年至南宋初期，以苏汉臣为代表的宫廷画师们创作了大量象征多子多福、人寿年丰的婴戏题材作品。但据学者考证，这与当时民间社会普遍流行‘计产育子”等自觉控制人口数量的俗又有所矛盾。据高三历史试卷第1页

(2)根据材料二并结合所学知识，概括1983~1985年间我国农村治理改革的特点并分析改革的原因。(4分)19.(12分)阅读材料，完成下列要求。外国人在中国投资是为了挣钱，几乎没有人考虑帮助中国发展经济。他们每年从中国赚取超母过10%的利润，并控制了中国近代经济的多数部门，这使得中国人赚钱和在商业领域占据合造的地位变得很困难。…外国投资者引进了近代技术和创业精神，并且投资了许多近代工业；他们成功创造了一种环境，在这种环境璄中，从事工亚获得利润是极为可能的，因此，这促使中国人仿效他们。此外，外国工厂和贸易机构雇用中国员工，对他们的培训，产生了具有生产技术知识和管理才能的本土人才，而对他们的利用也为中国人带来了好处。我们不应忽视这一事实：外国租进借地和条约口岸地区提供了一定程度的工业发展所需的和秩序，而且外国企业也承担了大部分“社会开支”，如公用设施、道路和通讯设施，这些都是使中国工业发展更加容易。摘编自许中约《中国近代史》材料提供了外国在华投资的一个解说，蕴含了中国近代化曲折发展的一些启示。从材料中提取个启示，并结合中国近现代经济史相关知识予以说明。（要求：观点明确，史论结合，言之成理）烧(12分)20.(16分)阅读材料，完成下列要求。材料一英国的“凯恩斯计划”建议成立一个名叫“国际清算联盟”的世界性中央银行，由各国根据1936~1939年间进口贸易的均额承担份额。该计划强调透支原则，贬低黄金的作用，目的是建立一个以英、美两国为首的透支性国际金融体系，使英国能够同美国分享世界经济的领导权。一摘编自王斯德《世界通史》材料二1949年，美国的黄金储备为246亿美元，占当时整个资本主义世界黄金储备总额的73.4%这是战后的最高数字。此后，逐年减少，至1971年8月，尼克松宣布“新经济政策”时，美国的黄金储备只剩下102亿美元，而短期外债为520亿美元，黄金储备只相当于积欠外债的1/5。美元大量流出美国，导致“美元过剩”，1973年底，游荡在各国金融市场上的“美元”就达1000姆多亿。-摘编自《布雷顿森林体系为何崩溃》(2016年8月17日环球网·财经)材料三汇率欧元兑美元走势图1.44吶1.4321.4241.4161.408/O//1.4了1999200020012002200320042005,2006霄D根据材料一并结合所学知识，概述英国“凯恩斯计划”提出的背景和目的。_(6分)通②根据材料二并结合所学知识，简析二成结束至70年代初美元地位走向及其原因。(6分以③)综合上述材料并结合所学知识，指出二战以来世界货币发展的特点。(4分)着村A》滚动联考03历史第4页

(6-10分)②所写的词汇有限，语法结构单调，错误较多且比较低级，影响理解。③未能有效地使用语句间的衔接手段，全文结构不够清晰，意义欠连贯。第二档①内容、逻辑上有较多重大问题，或部分内容抄自原文，续写不完整，与原文情境基本脱节。(1-5分)②所使用的词汇非常有限，语法结构单调，错误极多，严重影响理解。③几乎无使用语句间衔接手段，全文结构不清晰，意义不连贯。第一档未作答；所写内容太少或无法看清以致无法评判；所写内容全部来自原文；与题目完全不相关。(0分)四、评分参考1.评卷时注重内容、意义、逻辑与衔接。2.关注叙述、说明、描写的生动性，兼顾语言逻辑。注重意义的传达：语言的准确性，意义的丰富性（情节有发展）；不使用单一词汇；体现“交际意图”的语言才是好语言：过分使用高级词汇，过犹不及。

3药2.How does ASDA make refill shops become mainstreamA.By selling cheaper refillable containers.B.By prohibiting plastic packaging widely.C.By funding these first small refill shops.D.By building its own chain of refill shops.30.What's the function of paragraph 5?A.Warning grocers of plastic problems.B.Showing the necessity of refill shops.C.Telling the harm of single-use plastics.D.Giving the examples of going zero-waste.31.What are we advised to do to help protect the environment?B.Send plastie products to other countries.C.Enre wed fod nupD.uingmred than we nd.A.Purchase more products from brands.ot hrd t be potie u the d benetof spendingtme inDacromnioparks tothe simfdiypark ortree-lined neighborhood street,and some time working in the di of youwn garden.Aewstudy from rererCmUniversityhobenefittogyour body neitwerthemn healthcare."The mechanisms linking nature and health are verydiverseai MatthewH.E.M.Browning,the principal investigator on the study,"but the benefit is believed to be in partbecause being in green space can decrease stress,promote healthy behaviors and enable you tobreathe fresh air.”Browning and his team used satellite data to investigate how much green space was within250,500 and 1,000 meters(820,1,640,and 3,280 feet)of five million northern Californiaresidents who were insured by Kaiser Permanente.They then determined the costs theinsurance company paid out to those same members over a two-year period.They took intoaccount age,gender,race and a number of neighborhood characteristics including populationdensity and education levels.Even with all these factors included into their analysis,the researchers found that thosewho lived near the most green space had an average of $374 less per year in health careexpenses compared to those who lived farther from natural spaces.The researchers hope their findings will support public policies that prioritize(优先考虑)natural elements in residential areas.For you,maybe this learning will inspire you to planta tree or a potted flower todayor create a beautiful garden to enjoy,with a view of somehealth-giving,green goodness.32.What does the author intend to do in paragraph 1?A.Lead in the topic of the text.B.Summarize a recent study result.C.Provide some advice for readers.D.Raise readers'interest in exercise.33.What does Matthew H.E.M.Browning try to explain in paragraph 3?A.Why spending time in nature benefits health.B.Nature and health can affect each other deeply.C.How residential green space improves air quality.D.The benefit of walking in a natural space is obvious.34.What do the researchers expect of their findings?A.They can encourage further relevant research.B.They can delight current insurance companies.C.They can boost the establishment of green space.D.They can remind us to purchase more insurance.【2023年仿真模拟卷·英语（一）第5页（共8页）】2022.11.1723:04

得分评卷人I.任务型阅读：阅读下面短文，根据短文内容，完成下列各题。（共5小题，计10分)Kong Zi,Confucius in English,is a great philosopher.He lived and worked in Chinafrom 551 BC to 479 BC.He gave China and the world deep thoughts and ideas about lifeand how to live it well.They are known far and wide.Also,his works are studied in manytop universities.Confucius found out three main truths about a good life.First,he said we shouldrespect (the king.Next,we should do everything possible to respect each other.Finally,he believed that we can have a really good and happy life if we learn to live in harmony)This means that we should try to find a way to live peacefully both with each other,and with thenatural world.During his lifetime,Confucius travelled across China,working as a teacher.Wherever possible,hetried to put his ideas into action.None of his wise sayings were written down while he was alive.Hisfollowers collected them after his death.One of his greatest thoughts is that "Don't do to others what youdo not want others to do to you."Slowly,people everywhere learned about as well as from his wisdom.Today,Confucius is believed to be one of the greatest philosophers.His thoughts and ideas arestudied and spread all over the world.71.What did Confucius give to China and the world?He gave China and the worldabout life and how to live itwell.72.According to Paragraph 2,what will happen if people learn to live in harmony?They will have a品的个一是则空警，火一所别闹73.Why did Confucius travel across China?He travelled across China in order toby teaching.74.What does the underlined word "them"in Paragraph 3 refer to?It refers to75.What can we know from the last paragraph?We can know that Confucius's thoughts and ideas are veryinthe world.得分评卷人Ⅷ.补全对话（共5小题，计5分】根据下面对话中的情境，在每个空白处填入一个适当的语句，使对话恢复完整。A:I called you yesterday afternoon,but you didn't answer.76B:I was watching a video with my students in the classroom.A:What video?B:The three astronauts were teaching something interesting to the students.A:Sounds great.77.B:In the space station.A:Cool!Can you tell me more about it?B:78The astronauts showed some amazing facts which can'tbe seen on the earthA:Students must be surprised seeing them.九年级英语期中试题第7页共8页

第二节读后续写（满分25分）阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。I live in a small but lovely neighborhood.Our house is neither large nor luxurious,but ithas a fairly big garden.My father loves his garden.He planted some seeds in it;and tookgood care of the plants,watering them,applying fertilizer,weeding and getting rid of bugs.He was never tired of doing all that stuff.But at that time,I didn't understand why workingin the dirt 'excited him so much.Unfortunately,in the summer vacation before senior high.school,my father wasseriously injured in an accident.He had to stay in bed for awhile.My mother had severalbusiness trips,so she couldn't take care of the garden.I didn't want my father to worry.I.said that I would take care of his garden until he recovered.I assumed that the little plantswould continue to grow as long as they had water,and luckily it rained fairly often,so Ididn't think much about the garden.One:Saturday morning,my father.said to me;"Christine,the vegetablesshould.beabout ready to be picked.Let's have a salad today!"I went out to the garden and was upsetto see that many of the lettuce (leaves and carrots had been half eaten by bugs.Therewere hundreds of bugs all over them!I panicked for a moment but then I quietly went to the nearest supermarket to buy somevegetables.When I was making the salad,my mother came home and saw the bag from thesupermarket in the kitchen.I was embarrassed and admitted,"Dad would like a salad,butthe garden is a disaster.I don't want to disappoint him,so I went to the store and boughtsome vegetables."My mother smiled,saying,"Honey,you know what is the right thingtodo.”Paragraph 1My father seemed very pleased when I took the salad to him.Paragraph 2Feeling guilty,I decided to do the right thing.高三英语试题第11页.（共11页）

52.A.positiveB.anxiousC.curiousD.responsible53.A.disappointment B.joyfulnessC.argumentsD.injuries54.A.unbelievablyB.supposedlyC.unsuccessfullyD.actually55.A.damagedB.improvedC.arrangedD.weakened第Ⅱ卷（非选择题部分）第二节语法填空（共10个小题；每小题1.5分，满分15分)阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。When it comes to volleyball,we can't help 56(think)of Lang Ping.Lang Ping used to be a57(fame)player.Now she is also known as a coach who brings honor58glory to our country.Led by her,Chinese women volleyball team won the world championship in 2019,59 made thewhole nation excited.Lang Ping was born in Tianjin in 1960.She began playing volleyball as a teenager and 60(final)joined the national team in 1978.Her height made61 possible for her to play volleyballwell.Lang Ping and her teammates played so well that they won gold medals several times in_621980s.In 1995,she returned to China to work as a coach.When the Chinese team was preparing for the 2015World Cup,her determination63(test).Her team was falling apart,as she lost two importantplayers.But Lang Ping did not lose heart.She64(face)difficulties before,and she knew that heryoung players could win if they worked together as a team.Two weeks later,they were world_65(champion)！第四部分写作（共两节，满分32.5分)第一节单句翻译（共7小题；每小题2.5分，满分17.5分)66.当你上高中后，应该把注意力集中在学上。(ocus)67.Allen下周去秘鲁欣赏热带雨林独有的动植物。（现在进行时表将来：unique)68.芭蕾舞的优雅动作给观众留下了印象深刻。(movement:impression))69.这位专家发现这个大一新生对文学很好奇。（形容词作宾语补足语：curious)70.看起来他沉迷于网络游戏。(seem;addicted to)7l.他向学生推荐了这门高级写作课程，希望它能起到作用。(recommend;difference)72.尽管这名运动员在马拉松比赛中受伤了，他还是跑到了终点。(injure;make it)第二节应用文写作（满分15分）假定你是李华，你的朋友A1ice因为节食生病在家，请给她写一封建议信，帮助她走出困境。要点包括：1.表示宽慰：2.提出建议。注意：1.词数80左右：2.可适当增加细节，以使行文连贯。

第二节（共10小题；每小题1.5分，满分15分）阅读下面短，在空白处填人】个适当的单词或括号内单词的正确形式Zhou Hei Yais oneof best-known brands in China,mainly sells duck necks withsweet and spicy flavour.It.(announce)the launch of a plant meat duck neck product on its officialWechat account on Oct.102020.0Mn0unedLike many other new plant meat products,this new product not only has the fashion label of"plantmeatclaims to be low inealorie high in protein choerer trans-fatty acids.osynthetic pigments and no nitrites.other words,it includes "healthy"elementsZhou Hei Ya claims that the new plant meat product retains (the sweet and spicy tasteande)an advantage in colour and texture()compare)with the real duckneck,the plant meat duck neck certainly does not contain bones,so it will be much 68(convenient)for consumers to eat.布0d1more convenienterThe new product isgeiErreH(current)only available in some Zhou Hei Ya stores.This new productcan be seen as an attempt by Zhou Hei Ya70(break )into the plant meat market.to Dreak第四部分写作（共两节，满分35分）第一节短文改错（共10小题；每小题1分，满分10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号(A),并在其下面写出该加的词。删除：把多余的词用斜线)划掉。修改：在错的词下划一横线，并在该词下面写出修改后的词。注意：1.每处错误及其修改均仅限一词；sth for sb2.只允许修改10处，多者（从第11处起）不计分。、I went shopping with my mother who wanted to buyfor me a par of shoes.After three hours olooking and trying,we felt tiringSo we decided to find coffee shop and take a break.Inoticed a homeless maide.I remembered found n thhanging rooman02While waitedthe coffee,Plannedto give it to the man.But the man refused to take them.secret put the coin in one of his bagsbut left.y mother praised me later.I thought I just did hat my grandmother onteh told me:pass yourndomcone else no matter what smalltiskindnehow第二节书面表达（满分25分）》假定你是李华，上周五在你校举办的英语演讲比赛中获得了冠军。为了感谢外教Ry的指导和帮助，请给他写封邮件，内容包括：1.表达感谢；2.感谢原因。注意：1.词数100左右；2.可以适当增加细节，以使行文连贯。Yours,Li Hua广西国品文化《桂柳金卷》·英语（二）·第八页（共8页）

arrowheads I can.”“Sounds like a sport to me,.”Abbie agreed."How can you tell how old the arrowheads are?"Marcel asked.When the bus pulled up at the school,all the students voiced their“I have books to help me identify them,”Dean explained.“T'vefound some that are about 8,000 years old!"approval to Dean.Eyebrows(眉毛)raised all around the room."Whether arrowhead hunting is a sport or a hobby,"Ms.Bradysaid,"it certainly seems to have interested you all.Can I see hands forthose who'd like to take a field trip to look for arrowheads?"Twenty-four hands shot into the air.北京邢旺山东张传勇本报采编中心（听说材料及参考答案见下期第4版）KEY CORNER。。。。。。。◆=。。。。。■4。■。。。。l.录音问：How many countries have got helpa heart-to-heart hug!She really liked thatthe instructor of the club.For example,he taught综合能力评估试题(10]from the organization?参考答案me to pay attention to my body language when听说材料及参考答案学生答：24 countriesmaking a speech.More importantly,regularPart A略2.录音问：What is the biggest advantage of thePartB略（见听说材料）interaction with other members has made me more听说材料water projects?confident.Part CPart A略学生答：People's health improves信息点：I do hope more students will join us and wishPart B3.录音问：What does the organization mainly help1.All the students and staff were tested for thethe club a brighter future!M:Mary,tell us something about the Clean Waterto do?Covid-19 antibodies today.第二节organization.学生答：They mainly help to create systems that2.Only one test showed that someone did haveOne possible version:W:Well,Clean Water is a charity that aims tomake the water pureCovid-19 before.“lr's about time you got here,”said a voiceprovide everyone on the planet with easy4.录音间：What does the organization mind most3.When I was giving an online class,my colleagueas I pushed open the back door.I was surprised.access to clean drinking water.We have startedcame in.There was Mike,kneeling in the muddy garden:more than20,000 water projects in 24g里答oomo loca people aret4.My colleague looked unhappy and I asked herAll around him were plants carefully tied to shortcountries so far.technologywhat was up.sticks,badly beaten but bravely standing upM:They must bring real benefits for local people.5.录音问：What does Mary often do in her free5.My colleague told me her brother passed awaystraight in the early morning sunshine."How longW:Of course.Above all.their health improveswhen they have clean water.Dirty water causes星答：Seetoday.have you”I began..“Since5am,”he replied.lectures about keeping6.My colleague had a poor relationship with herthink I was able to save most of the plants;the rainmany diseases.Also,more food can be grownhealthybrother.really beat them down,but these sticks should holdwell.Part C7.I was just listening patiently and I wanted tothem up until they get bigger and stronger."HeL.学生问：How are you able to provide cleanVirus Free Hugcomfort her.pointed to several newly planted rows."A lot ofwaterToday was a big day at our school.337 of us8.I told her my test was negative.the seeds got flooded out and were lying on top of录音答：Wel,we work with local people to findwere tested for the Covid-19 antibodies!336 tests9.I just held her as she cried.the ground.I replanted most of them before theout what will work best for each place.Theycame back negative and one test showed that10.A hug was the best way of comforting mybirds had them for breakfast,"he explained.help dig a hole and lay down pipes and wesomeone did have Covid-19 somewhere between 3colleague!"I can't believe this after what you said lastmainly help to create systems that make theweeks and 3 months ago.I hoped we were all in a1-5 DCBAB6-10 DCDDB11-15 CACBAnight,"I said."Like I said,don't believe everythingwater pure.safe zone.While I was teaching my class on the16-20 EAFBG21-25 ACBDC26-30ABABCyou hear,”'he said.“After all,friends help2.学生问：How do you decide which technologyInternet,my colleague in the room next door came31-35 CABDDfriends."Then he smiled,and a warm feelingis suitable?in.I sensed something was wrong so I asked her36.addiction37.A38.enjoyedspread through me."Now come on;there's still a录音答：It depends how comfortable localwhat was up.She told me that her brother passed39.approaching 40.was glued41.whatpeople are with technology.When choosingaway today.She told me about their troubledlot to do."Happily,I knelt down beside him.And42.males43.im44.terriblyalthough we would go on to grow a great gardenwhich type of technology to use,we check thatrelationship.She also spoke about how there was45.to keeptogether for many summers,that first garden wasspare parts can be found in the local area so thacomfort in knowing that he was on this Earth,but写作always my favorite:repairs can be made quickly if a problem comesnow that was gone.I just listened patiently.Then I第一节up.said,"If it'd help,and you want,I'll give you aOne possible version:3.学生问：What do you do when you're nothug.”She smiled and said,“Did you testEnglish Speech Club and Me教教教working?negative?"I said yes.What followed was aAs the fifth anniversary of the English Speech录音答：I like to give lectures about keepingwonderful and tender embrace.I just held her asClub approaches,I would like toexpress how学healthy,such as encouraging children to washshe cried.It seemed like forever.And then whenproud I am to be a member of it.their hands.Pupils then pass on the informationwe separated I told her what a dear friend had toldI have benefited greatly from the club.I have经资to their families.In that way,the whole familyme about hugging.If you hug with the left armlearned various ways of speaking English fluently.▣35源验learns what they can do to keep healthy.over,right arm under,and head on the left,you getIn addition,I have learned a lot from Mr.Brown.●报社地址：山西省太原市晋阳街202号英语周报社●邮编：030006●电话：0351-7773933●印刷：武汉彩集实业有限公司（武汉市汉南区华模工业园22栋1号）●排版：本报激光照排中心●责编：司秀娟●校对：周慧英●美编：邝艳相●订阅：本报发行部●订阅热线：0351-7333565●广告经营许可证号：晋工商广字140100400003

(1)钛酸亚铁(FTiO3)中铁和氧的化合价分别为+2和一2，所以Ti元素的化合价为十4，铁红的用途为制备红色颜料和油漆、冶炼铁等。(2)“水解”中，发生反应的离子方程式为TiO2++2H2O一H2TiO3￥十2H+。(3)“沉铁”时发生反应Fe++2HCO3一FeCO3↓+CO2个十H2O,气态产物为CO2,其电子式为:O:C爻：O:;该过程需控制反应温度低于35℃，温度过高NH4HCO3会分解，而且会促进亚铁离子的水解，所以原因为防止NH4HCO3分解或减少Fe+的水解。(4)FeC0,转化为铁红时，发生反应的化学方程式为4FeC0,十O,烧2Fe,0,十4C0,。(5)若滤液3中c(Mg+)=1.2×10-3mol·L1,假设溶液体积为1L,则n(Mg2+)=1.2×10-3mol,沉淀这些镁离子要消耗的n(OH)=2m(Mg*)=2.4X10ml,反应后溶液体积变为2L,c(0H)=√0Md-√.0X10m0l:1.0×10-nL1=1.0×10-3mol·L1,所以n(OH)总=2.4×10-3mol+2L×1.0×10-3mol·L1=4.4×10-3mol,向其中加入等体积的Na0H溶液的浓度最小为4.4X10m0l-4.4X10m0l·L时，可使Mg*沉淀完全.