货么是生去头品极意产与无者出生了什么后果、定期重复的商沙危，机会产生什么后果、新的社会制度应当是怎样的等等。可见（共产主义原理A.为工人运动提供科学理论指婚C.为《共产党宜言》奠定了基础B,使社会主义理论从空想变为现实D,比马克思更能深刻批判旧丛会).美国特朗普政府承认耶路撒冷为以色列首都，公然我路联合国决议和国际社会共识，单方面退山朗核问题全面协议，导致中东局势持续紧张：抛弃美俄“中导条约”着所谓“自由航行”旗号，派军舰到全球数十个国家海域耀武扬废。美国的行为动摇全球战略安全基石A.旨在推行冷战时期的政策C.为了维护其贸易保护主义B,对世界和稳定造成威胁D.意欲构建世界和新秩序10下表是我图古代书籍中有关农业方面的记载，据此可刻生质《诗经》《荀子·富国》《氾胜之书》多粪肥田，是农夫这主除草沤肥、使黍肥料种类已有蚕《王祯农书》众庶之事也矢、骨汁、粪便记有大粪、踏粪、稷繁茂苗粪、草粪等多种我国是世界上最早使用肥料的国家B.我国古代农业生产力水逐步提高A.C.古代的统治者非常重视粪肥的使用D.中国古代精耕细作的农业不断发展11.1801年，伍秉鉴接手了怡和行的业务。他善于笼络各行商人，长期担任十三行公行的总商十二行行商的领头人，不但在国内拥有地产、房产和巨款，而且在美国投资铁路、证券交易和保险业务等。伍秉鉴的发展主要体现了A.清朝闭关锁国政策的破产B.清朝国内市场贸易的繁荣C.朝贡贸易下对外交流频繁D.清朝在新形势下逐步开放12.华新纱厂的商人业主汤子壮邀请上海道台龚照瑗为该厂合股人。龚照瑗积极寻求上海道库给子资金支持。“一切筹备经费，均由上海道库惠通官银号垫支”。共分4500股，每股100两，官利(定为8厘。据此可知A.近代民族企业部分特征B.近代企业缺乏资金短C.中国近代化进程被中断D.民族工业已摆脱了困境13.有学者认为：新航路的开辟，使欧洲食物原料的开发与利用冲破了区域性的限制，从而消除了驰举行，各地区饮食内容的差别，打破了食物原料的短缺状况，改变了传统的饮食结构和饮食惯材料做到意在说明，新航路的开辟A.减少了各地区的贫富差别B.密切了各国的经胶流C.改变了东西方的传统观念D.有利于各地区食物互补14在国民经济结构中1919年工农业产值的比重，工业占622%，农业占37.8%。在工业结构电的疫情1923年重工业的产德占工业总产值的50.1%。这些反映了此时美国通过第二次工业革命名处。美A.开启了近代化煌B.基本实现了工业化促进新兴工业发展D.缩小与英国经济差距15,下图是介绍我国“一五计划”的通俗图解读本的封面。该封面内容反映的主题是，当时我国(C.查监督知陪审A我国第一国五年計社会主义工业化的基础得到奠定B,社会主义经济体系已经基本建立D,国民经济的恢复工作己全面完成满了流A.推行优先发展重工业的基本方针泛确灰佛培双在铁散清改行妇失症中的是接兴费费.C.英国冷和洋行模自松沪铁路，被清政府假拆除味铁在建国的造遇体现了16.B,清政府愚昧落后思想A.中国近代化进程受阻D.清政府排斥英国商人C.民众对铁路缺乏认炒滚动联考02历史第2页

28.两税法与租庸调制不同，户无主客，以现居为簿，人无丁中，以贫富为差。这一政策的调整A.从根木上减轻了农民的负担B.促进了租佃关系的迅速发展C.以政府严格控制户籍为前提D.以财产性收入作为征税依据29.唐代科举制除设明经、进上等常举科目外，还设置了由皇帝亲白主持的临时性的制举科目，包括贤良方正科、直言极谏科、军谋宏远堪任将帅科等，民百姓和官吏均可应试。这表明唐代A.士族阶层开始衰落B.科举取上具有随意性C.信史选拔其有多元性D.民政治开始出现30.据宋代陆振的《九国志》记载，唐哀帝时攻打豫章（今江西南昌），“发机飞火”，烧毁了该城的龙沙门。由此可知A.唐代火药应用于军事B.唐代炼丹家发明火药C.唐哀帝最为重视军事D.军事需要促使火药发明二、非选择题（本大题共3大题，其中第31小题12分，第32小题13分，第33小题15分，共40分)31.阅读材料，回答问题。(12分)材料一：除了军事与经济资源的互为挹注，这些封君与尚王室之间，也依仗宗族纽带，用祖先崇拜的繁缛礼仪，以朝贡、觐见、馈赠、通婚、封赏…不断加强亲戚之间的火系。…亲缘网络的伦理要求，是敦唪亲戚的孝道。于是，周人统治的机制，取得了道德的意义。一一许倬云《万古江河：中因历史文化的转折与开展》材料二：食贱则农贫，钱重则商窝…食贵则田者利，田者利则事者众；食贵，籴（买入）食不利，而又加重征，则民不得无（不）去其商贾技巧而事地利矣。《商君书·外内》(1)根据材料一指出“周人统治的机制”，并结合所学概括这利机制在当时的积极作用。（6分)(2)根据材料二，推断商鞅的思想主张，并简述其对秦国的影响。(6分)32.阅读材料，回答问题。（13分)材料一：汉初制度大多不切实际，要求制度变革的呼声甚高，却无法得以实施。直到武帝时期，才大刀阔斧地推行了制度变革，这是一个事功显赫的时代，也是一个垂范立制的时代，在协调地方与中央的关系、解决皇权与相权矛盾、强化对官僚队伍的管理、确立新的经济政策等重大方面，汉武帝都进行了制度创新和变革。一一孙家洲、王义涛《制度变革与汉武帝盛世的造就》

关键字：“我”坦白真相，受到鼓励，将功补过，收获成长。建议：侧重动作和心理描写。3.参考范文One possible version:My father seemed very pleased when I took the salad to him."It looks so good.Your saladmakes my mouth water,"Dad couldn't wait to try it.He forked a piece into his mouth and chewedslowly,his face spreading in a satisfied smile.Giving me a thumbs-up,he said,"Little did I knowyou are so good at gardening.You are a man of your word."My father kept praising me,whichmade my ears burning.Feeling bad about what I had done,I forced a bitter smile.How could Icheat my father?Feeling guilty,I decided to do the right thing.With tears welling up in my eyes,I told myfather I didn't live up to his expectations and that the garden was a mess.To my surprise,insteadof scolding me,my father patted me on the shoulder gently and told me to turn to him if I neededany help.Under his guidance,I learned to apply fertilizer,weed and remove bugs.The vegetablesbecame better and better day by day,and so did my father.I began to enjoy taking care ofvegetables and I finally understood my father's pleasure of working in the dirt.二、评分原则1.本题满分为25分，按7个档次给分。2.评分时，先根据所续写短文的内容和语言初步确定其所属档次，然后以该档次的要求来衡量、确定或调整档次，最后给分。3.词数少于130的，从总分中减去2分。4.评分时，应主要从以下四个方面考虑：(1)与所给短文及段落开头语的衔接程度：(2)内容的丰富性：(3)应用语法结构和词汇的丰富性和准确性；(4)上下文的连贯性。5.拼写与标点符号是语言准确性的一个重要方面，评分时，应视其对交际的影响程度予以考虑。

What do club members get?Every month,kids receive a themed box filled with kid-tested recipes,hands-onactivities and experiments,and other creative items.80.83Explore our digitaliary of kid-approved recipes,ativitiespermnand more!Plus,find each month's shopping listso yo have all the ingredients()onhand when your box arrives..Young chefs share"Make It Your Way"cooking challenges.America's Test Kitchenexperts are always available to answer questions.How we are different:.For the first time ever,America's Test Kitchen,a brand trusted for more than 25years,has offered its food and science expertise to kids.Each and every one of our recipes,activities,and experiments is tested at home(or inour kitchen)by members of a group of more than 5,000 kids across the country.Explore our digital library of family-friendly recipes,hands-on activities,videos,andother educational resources.We break down the fundamentals of science and cooking in family-friendly recipes.Each box contains projects that range from 15 minutes to a few hours,with recipes that can becooked again and again..We encourage kids'natural creativity through monthly"Make It Your Way!"recipe challenges.Fees:Monthly:$24.99 per monthSix months:$21.99 per month(Best value-save $18)21.How can kids benefit from joining the club?A.They can receive free ingredients for each recipe.B.They can often ask experts questions on cooking.C.They can avoid taking cooking quizzes at school.D.They can get cooking books from its physical library.22.What is a feature of the club's each recipe?A.It is tested by many kids.B.It is created by member kids.C.It is shown in a 15-minute video.D.It is especially easy for members.23.How much should you pay at least for 6-month membership?A.$21.99.B.$108.C.$131.94.D.$149.94.BThailand's "loneliest tree",a tree growing on a rocky island only a few meters in diameter,is being seriously threatened by tourists desperate to get a selfie()with it.The small patch of land located just off the country's eastern coast in Trat Province hasbeen called "Koh Khai Hua Roh"because it looks similar to the island featured in drawings offunny scenes involving a man and a woman trapped on an island in the popular KhaiHa Rohcomic.The uninhabited island is quite a sight to behold,as it is home to a lonely tree thatstruggle to live despite being surrounded by salt water.Unfortunately,the tree's popularitymight just be the death of it.On Tuesday,the Koh Mak Tambon Administrative Organization led a team of Thaireporters to Koh Khai Hua Roh in order to observe the country's loneliest tree.They knewthat photos of the lonely tree shared on social media had been attracting an increasing numberof tourists to the isand,but they had no idea how much damage that could produce.According to The Nation,several small branches of the tree were found broken off,thetree's exposed roots appeared tohave been stepped heavily on to the point where the outer【2023年仿真模拟卷·英语（一）第3页（共8页）】

48.The underlined word in the passage probably means"A.unbelievableB.uncertainC.unforgettable49.Which of the following is TRUE according to the passage?D.unexpectedA.Richard went to the City Wall in September.B.Richard's father loves history very much.C.Richard has sent many photos to Xiao Li.D.Richard is an exchange student in Xi'an.50.Richard wrote the passage to上A.introduce his travel plan in Xi'anB.introduce his family membersC.describe places of interest in Xi'anD.describe the Terracotta Army第二节：根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（共5小题，计5分）As we all know,animals are important in our daily life.For example,dogs can be good helpers tohuman.What about monkeys?51 Yes.They can do a great job,too.Monkeys can helpdisabled people live a better life just as dogs do.52One difference is that monkeys live longer than dogs do.This means that a monkey's"childhood"is also longer than a dog's.So it may take them four to six years before they are ready tobegin training.It's said that it is almost as much work as raising a young child!装After monkeys begin training,they usually take about a year to learn enough tasks to be goodhelpers.53For example,if is a person wants to have the lights turned on,he or she may givethe order“sun”54 The monkey will know what its owner wants when it hears these orders,and it will complete the tasks.As the monkeys get better at completing their tasks,they learn new and more difficultones.55Can you imagine that in the future some disabled people keep monkeys as their pets and at the sametime the moneys can help them to make their life easier?A.Some monkeys can even learn how to use a computer!B.Monkeys can play with people when they are free.订C.Can they also help human?D.One important thing that they need to learn is how to follow orders.E.If the owner has dropped something,he or she might say "fetch".F.Likes dogs,monkeys need lots of training to be human helpers.C.Unlike dogs,monkeys don't need lots of training to be human helpers.第一部分答题卡题号12345689101112131415每案线题号2122232425262728293031323334353637383940答案题号414243444546474849505152535455答案九年级英语期中试题第5页共8页

"And that's where we got all our information."Someone who speaks low and slowly might第二节（共5小题；每小题2.5分，满分12.5分）have Parkinson's disease.Speaking unclearly is a sign of a stroke.Scientists could even根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余diagnose depression or cancer.选项。The team will start by collecting the voices of people."We were really lacking largeWork,family and world events can be so stressful that it feels like optimism and joy arewhat we call open source databases,"Bensoussan says."Every institution has.their ownfar out of reach.Anyone can get stuck in a bad mood-but you don't have to staydatabase.But to create these networks was really important to then allow researchers fromthere！36other generations to use this data."The ultimate goal is an app that could help bridge accessto rural or underserved communities,by helping general practitioners refer patients toOnce you're in a mood you need to shake,start by going to your happy place.37 Ifspecialists.To get there,researchers have to start by collecting data,since the AI can onlynot,keep a photo on your phone or computer of a beautiful,favorite place and take aget as good as the database it's learning from.By the end of the four years,they hope tomoment to imagine yourself there.What's the weather like?What does the air smell like?collect about 30,000 voices,with data on other biomarkers-like clinical data and geneticWhat are you doing while you're there?How does being there make you feel?You'llinformation-to match.instantly feel calmer,lost in the daydream or the memory of your happy place.There are a few roadblocks.HIPAA-the law that regulates medical privacy-isn'tWe can make our situations worse by keeping thinking about negative thoughts.38.really clear on whether researchers can share voices."Let's say you donate your voice to our"Bad things always happen to me,"becomes "What lesson can I learn from this situation?"project,"says Yael Bensoussan."Who does the voice belong to?What are we allowed to do"I wasted the whole day,"becomes "1 sttll have 5 more hours left to make.today awith it?What are researchers allowed to do with it?Can it be commercialized?"great day!"32.What does Yael Bensoussan mean in Paragraph 2?Whether it is going for a coffee at your favorite cafe,or catching a movie in the theatre,A.Voices may help with illness diagnosis.make sure that oncea week you schedule some "me"time.39 That may mean gettingB.Scientists can rely on an AI to detect illness.less done during the day,but you deserve to take a mental break,regularly.So give priorityC.Disease symptoms can be noted by machines.to the time you need to recharge.D.It's necessary for doctors to listen to patients talking.33.How will.the research be carried out?40 Whether it's the rare bit of easy traffic on your way to work or the break in theA.By building a base.B.By collecting dataweather,you won't have time to complain about the negative things because you're so busyC.By connecting communities.D.By matching clinical information.being grateful.34.Why is HIPAA mentioned in the last paragraph?A.You can also volunteer at your local shelter.A.To prove the researchers'idea.B.It helps focus on the present and clear your mind.B.To explain the procedures of the study.C.Thankfully,there are ways you can get back on track.C.To imply the problems with the research.D.If you're able,get into nature and breathe the fresh air.D.To ensure the commercial value of the study.E.Relieve your stress and refresh your mind,body and spirit.35.Which of the following can be the best title for the text?”，F.When a negative thought flashes,replace it with apositive one.A.An Application for Voice StudyB.Data-collected Approach to ResearchG.When a negative attitude takes over,shake it off by practising gratitude.C.A Breakthrough in Medical FindingsD.Sound-aided AI Help With Diagnosis高三英语试题第7页（共11页）高三英语试题第8页（共11页）

heart disease,depression and extra weight gain.When people feel fear,negative effects increase,but when they get angry,those negatives go down,according to the study."Having that sense of anger leads people to actually feel some power in what otherwise is amaddening(令人发狂的)situation,,”Lerner said.Lerner previously studied Americans'emotional response to the 9.11 terrorist attacks(9.11)two months after the incident.She found people who reacted with anger were more optimistic.Thesepeople are healthier compared with those who were frightened during the event.So in maddening situations,anger is not a bad thing to have.It's a healthier response than fear.32.In what ways can anger be good to people?A.By showing their optimistic side.B.By reducing their stress.C.By reducing high blood pressure.D.By taking the place of fear.33.The researchers made the students angry byA.recording their performance secretly.B.asking them to count to 6,200 again and again.C.disturbing them and making them start all over again.D.criticizing them when they made mistakes.34.What does the underlined word"both"in Paragraph 5 refer to according to the passage?A.Fear and anger.B.Blood pressure and pulse.C.Blood pressure and cortisol.D.Higher blood pressure and higher levels of the hormone.35.What is the story mainly about?A.The findings of new psychology research.B.What you can do with anger in certain cases.C.Different effects produced by anger and fear.D.Healthier responses in maddening situations.第二节（共5小题；每小题2.5分，满分12.5分)阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。What are the advantages and disadvantages of eating fast food?Many people do not have time to eat home-cooked food.36There're more than 13,000McDonald's restaurants in the United States itself,and over 8,000 KFCs in 80 countries.In most cities,it isnot difficult to find hamburgers and pizza.Advantages of fast food37 Eating fast food helps working people and students to get back to work as quickly aspossible.Besides,many love the look,smell and taste of it.Perhaps the greatest advantage is the price.38 If one lives alone,then it is cheaper to buy a meal at the supermarket than cook it at home.Disadvantages of fast foodThe greatest disadvantage of fast food is the bad effect that it has on one's health.Many people feelthat fast food is unhealthy because it contains a lot of artificial ingredients().Some even thinkthat it is addictive(E because of these ingredients._39 Fast food may cause overweight in theAmerican population.40 I believe that it can be a good thing,as long as people do not eat it too often,eat plenty offruit and vegetables,and also do plenty of exercise to keep in shape.

33.How did the researchers conduct the study?A.By making 3D printed wings.AC.By copying real flying environments.B By collecting seabird specimens.34.What do Mostafa Hassanalian's words in the last paragraph show?D.By observing seabirds'flight behavior.A.His doubt about this project.C Possible applications of the findings.B.His achievement in technology35.What can be the best title for the text?D Possible reasons for the success of the studyA Birds flying long distances live longerB.Dark wings supercharge seabird flightC.Lighter-winged birds tend to have black wing tipsD.Extreme weather threatens the survival of seabirds第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Being a good team player is an essential skill,especially at work and school.Don't worry if youstruggle with teamwork.You can improve your skills as a team playerShare credit with your teammates.No one likes agreedy person,sp don't steal the spotlight.Treatthe team's accomplishments as a group success.For instance you might give your teammatecredit for having a great idea that helped your team finish your project in half the time.This shows eadership skills,while also making of the teamSharingyour thoughts shows that you have more to offer and are thinking outside the box.Even if your ideas aren'tright for the project,they might lead to future innovations on a different projectPick team members who have skills that complement()yours,if you can.If you have a choiceon who you'll work with,look for people who are different from you.3Include input from all team members so everyone is heard.A team can only thrive if everyone feelsvalued and heard.Not all ideas are winners,but the group must still listen to them and consider ifthey're good ideas for this project.Make it a priority to collaborate (as much as possible.If teammembers start to feel as though their ideas don't matter,they'll stop being an active part of the team39Participate in brainstorming sessions to eneourage collaboration.When you can,meet in person soyou can have a free exchange of ideas.40_Teams are most effective when they collaborate,sobrainstorming sessions are a great tool for good teamworkA.Speak up when you have ideas about a topic.B.Make sure you do an equal share of the work.C.Don't expect your teammates to take responsibility for keeping you on track.D.This will hurt your overall output as you're losing valuable ideas and expertise.E.Additionally,acknowledge the individual contributions made by your teammates.F.If this isn't possible,schedule a digital conference through service providers like Skype.G.It's better to have diverse ideas and skills on your team,as you'll be able to be more creative.第三部分语言知识运用（共两节，满分45分）第一节（共20小题；每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填人空白处的最佳选项Every day after school,Khloe Thompson noticed the same woman standing outside her school.That广西国品文化《桂柳金卷》·英语（二）·第六页（共8页）

手梅was opened in 1900.several61 (ton)ofmaserip/s().serolls,booklets and paintings onsilk and paper were found literally 62(pack)into it.These valuable writings were collected betweenthe 9th and 10th centuries CE,by Tang and Song Dynasty Buddhist monks()the cave and then filled it 64nt and current manuscripts on topics65range)fromreligion and philosophy,history and mathematics,to folk songs and dance.a92n月Cave 17 is only one of the 735 human-made caves called Mogao Grottoes,which were dug into aloess cliff黄土峭壁)about 15 miles southeast of the town of Dunhuang in Gansu Province.Dunhuang'slong and66 (brilliance)history reflects its 67(significanas a center of cultural and religiousexchange.These caves were dug and maintained by Buddhist monks from 366 CE and were sealed andhidden about a thousand years ago.It was not until 1900 that they686 rediscover☑八The Dunhuang Academy was set up in China in1980s,aiming to collegt and preserve themanuseripts;the Intemational Dunhuang Project (IDP)was formed in1bring)theinternational scholars together to work jointly on the collections.The IDP has put many of the documentsonline,as images and as translations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（∧），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；2.只允许修改10处，多者（从第11处起）不计分。One day last summer,my mother and I was waiting in line to order at a fast-food restaurant.A youngcouple stood in the front of us,and two firefighters waited behind us,tiring and sleepy.Suddenly,along loud sound came from their fire truck parking outside.We knew what meant they had to go to work.Asthey turned to leave,the couple,who had just received his food,handed their order to the firefighter.Thecouple then get back in line to reorder.Moved by their selfless act,we decided give our food to them andrefused to take their money.We were very gladly to pass the kindness on to more people.第二节书面表达（满分25分）假定你是李华，外教Melissa想在本周六去参观市历史博物馆，并邀请你做向导，但你因故不能如期赴约，请你给她写一封邮件，内容包括：1.表示歉意2.说明原因；3.询问能否另约时间。注意：1.词数100左右；2.可以适当增加细节，以使行文连贯。广西国品文化《桂柳金卷》·英语（三）·第八页（共8页）

Ga与Al同为第ⅢA族元素，溶液中Ga3+及其与OH-形成的微粒的浓度分数a随溶液pH变化的关系如图所示。已知Kp[Ga(OH)3]=1.4×10-34,向GaCl,溶液中滴加NaOH溶液，关于该过程的说法错误的是100Ga(OH),80Ga3Ga(OH)Ga(OH):40Ga(02%4101214溶液pHA.Ga(OH)2+浓度分数先增大后减小B.Ga3++H2O一H+十Ga(OH)2+,该反应衡常数K的数量级为10-3C的比值逐箭减小D.pH=9时，c(Na+)>c[Ga(OH)4]【答案】C【解析】由图可知，Ga(OH)2+浓度分数随pH增大而先增大后减小，A正确；Ga3++H2O、H++Ga(OH)2+,该反应的衡常数K=c(H)XcCa(OH],由图可知c[Ga(OH)+]-c(Ga*)时，pH≈2.5，即Kc(Ga)c(H)Xc[Ga(OHD)+]≈102.5，因此K的数量级为10-，B正确；结合B项分析可知Ga++H,0一H+c(Ga3)Ga(OH+,K=cH)XcGa(OID+]≈102，同里Ga(OH)++H0Ga(OH+H,Kc(Ga)cH)Xc[GaoD]≈10-，Ga(OH时+H0一Ga(oH,+H+,K,-c(H)XcGa0H.]≈10，c[Ga(OH)2+]cGa(OHGa(OH),+H,O一Ga(OH+H,K,-c(H):Ga(OR]≈10，c[Ga(OH)3]则K,×K,×K,×K,=c(H)XcGa(OH)+]×c(H)xc[Ga(OHD]Xc(H)xc[Ga(OH)]XcGac[Ga(OH)2+]cGa(OH)c(H):cGa(OH)]=10-1a7,即10-16？=CCH2cGa(OH)c(Ga+Xc[Ga(OH),],由图可知c[Ga(OH):]逐渐增大，则逐渐减小，c《Ga逐渐增大，C错误，结合图像可知pH=9时存在电荷守恒为c(Na+)+cc(Ga3)c[Ga(OH)A]十c(OH-)+c(CI),因为c(H+)c[Ga(OH)],D正确。二、非选择题：本题共2小题，共40分。11.(18分)某研究小组进行Mg(OH)2沉淀溶解和生成的实验探究。[查阅资料]25℃时，Kp[Mg(OH)2]=1.8×101,K,[Fe(OH)3]=4.0×10-38。[实验探究]向2支均盛有1mL0.1mol·L1MgCl2溶液的试管中分别加入2滴（约0.1mL)2mol·L-1NaOH溶液，制得等量Mg(OH)2沉淀。(1)分别向两支试管中加人不同试剂，记录实验现象如表所示：（表中填字母）试管编号加入试剂实验现象2滴0.1mol·L1FeCl,溶液①24mL2mol·L NH CI溶液②」A.白色沉淀转化为红褐色沉淀B.白色沉淀不发生改变C.红褐色沉淀转化为白色沉淀D.白色沉淀溶解，得无色溶液(2)测得试管I中所得混合液pH=6,则溶液中c(Fe3+)=(3)同学们猜想实验Ⅱ中沉淀溶解的主要原因有两种：猜想1：NH结合Mg(OHD2电离出的OH,使Mg(OHD2的溶解衡正向移动。猜想2：·44·