6.某同学探究温度、H、底物浓度与酶促反应速率的关系，绘制出如下曲线图。有关叙述正确的是反应婆速率反应率G相关因素相关因素相关因素图1图2图3A.图1中AB段与BC段酶促反应速率的限制因素相同B.图2中D点与F点酶的空间结构都被部分破坏且不能恢复C图3中把G点时对应的相关因素调至最适，则酶促反应速率不能同步升高丑，图1、图2、图3中相关因素依次分别是底物浓度、pH、温度7.右图表示油菜叶肉细胞光合与呼吸过程中有关物质的⑤-H204④H变化途径，其中①~⑥代表相应的生理过程。相关叙H切述错误是①A.过程①②③都不在生物膜上进行-CH0。@→丙酮酸®B.参与过程④和⑤的酶种类相同C.过程②③④⑤都有ATP产生⑥-C02+D.过程③产生的[H]不全都来自于丙酮酸第7题图8.下列关于细胞生命历程的叙述，正确的是A,原癌基因和抑癌基因都能阻止细胞不正常增殖，避免细胞发生癌变B。被病原体感染的细胞的清除，是通过细胞调凋亡完成的C。细胞在衰老时细胞核体积增大、核膜内折等变化能使物质交换功能增强D.“老年斑”等色素沉积是细胞分化的结果9.下列关于生物科学史的相关叙述，错误的是A.赫尔希和蔡斯通过噬菌体侵染细菌的实验证明DNA是遗传物质、)萨顿研究蝗虫的有丝分裂过程，运用类比推理法提出基因在染色体上的假说C.“成对的遗传因子彼此分离”是孟德尔提出假说的主要内容之一D.沃森和克里克研究DNA分子结构时使用了构建物理模型的方法10.小鼠颌下腺中存在一种表皮生长因子EGF,它是由53个氨基酸组成的单链，其中含有6个二硫键（形成一个二硫键会脱去2个H)。EGF与靶细胞表面的受体结合后，激发了细胞内的信号传递过程，从而促进细胞增殖。下列说法不正确的是A.EGF的基因至少含有318个脱氧核苷酸B.在氨基酸形成EGF的过程中，相对分子量减少了948C.EGF和高温处理后变性的EGF都能与双缩脲试剂产生紫色反应D.EGF的mRNA沿着多个核糖体移动快速地生成EGF高三生物第2页共8页

关诒周私-ENGLISH WEEKLY掌上周报微信小程序英语周报智能小助手(2021-2022)第20期高二北师大（新教材）《英GUIDED WRITING如何用英语写书评假定你是李华，在校英文论坛上看到大家第二部分：故事梗概The tale is about the exciting adventures of在讨论自己最喜欢的课外书。请你根据所给提普通表达高级表达a puppet,Pinocchio.After an angel brings him toKEY CORNERM:Well,you're welcome to use our fitness center.M:That's a great mix of subjects!It sounds a bit likeOne possible version:It s on the second floor and it's open 24 hoursschoolDear Kevin,选择性必修三UNIT8 TOPICW:Greatthat will allow me to exercise beforeW:Well,it's nothing like school and you don't getThe Gift of the Magi is my favorite.It is aboutworkany homework.I did sign language last year andTALK,LESSONS1&2(Text 7)M:Are you still enjoying your Chinese lessons?it was very motivating.In fact,I took it up as amake each other happy despitethe difficult situation听力材料及参考答案hobby after the fair.W:I am,but we always focus on reading andM:Brilliant!Does the fair finish at 8:30 pm?ThatDella sacrifices her hair to buy Jim a watch chainwriting,and less on speaking.Jim sells his gold watch to buy his wife combs.听力材料seems quite early.Nf there are o more queston lt moveM:It's the same problem with textbooks-they'reW:Then there's a concert in the park at 9:00 pm.realize that sacrificinggood for exercises on grammar,but you obviouslyBut you have to buy tickets for that.can't talk to a book!But lots of people learneverything without expecting toget anything inM:Yes.The good news is that the fair is giving awayon to the next chapterreturn is true love.True love is the most valuableM:Excuse me,ProfessorChinese these days,so there must be groups thatcould we go over thattwo tickets.Just send your name and address on athing in life.meet just to practice talking to each other.Whylast point once more?postcard to Fizz Radio.The winners will also ge(Text 2)not search for one of those online?W:Good idea.their photos taken by a professional photographerM:There was another serious accident at the comner(Text 10)(Text 8)Hello,I'm Bob Frist from the city fire department.第二节of Lamont Road and Highway 67.W:Hey Joe!Where have you been these past fewOne possible version:W:Oh.no!That's the third one already this year.I've been asked to review the emergency evacuationdays?procedures for all of the hospitals in the area.If thereAfer a quick trip to a doctor Arabella insistedThe city needs to put a traffic light thereM:I've been busy with a first-aid course that Iis a fire in your building,this information could save(Text 3)started about a week ago at the Red Cross.We'vee rea party must go on.So that s just what theyyour life and the lives of those under your care.Inchildren.The doctor gave ihe little girl aW:I thought you said it was five cents a copy.learned how to apply pressure to stop bleedingM:I did,but it's ten cents a copy when you makeand how to apply CPR.Next class,we'll learnthe event of a fire,the first thing you need to do isclean bill of health and suggested this might be afunny story later in life.By all accounts,apart fromturn on the fire alarm by pulling down on this whitefewer than twenty copies,and you only madehow to make your own first-aid kit!missing a lock of hair and a little skin,Arabella wasfifteen copies.W:Have you treated any real emergencies?bar.This will warn the fire department.Along withfine.The family all agreed that things could havethe alarm bell that you ll hear,you will also see(Text 4)M:Well.they took us along with some paramedicslights flashing in every building when the alarm isbeen far worse.Then the girls found a fewM:How is Lucy getting on with the violin?There was this guy who had cold sweats andheadbands to cover the wound until all of Arabella'sturned on.If you see these lights or hear the alarmW:Oh,we've given it to her cousin.She found itshortness of breath.He felt great pain in his chestair returned.pell,it is essential to close all doors and windows toThe family has decided to publish the story ofmuch more difficult to play than the guitar,soarea.I was at a loss what to do.But theparamedics were calm.They seated the patient inkeep smoke and fire from spreading.Evacuate theshe's gone back to playing that instead.With herArabella to warn others.They want others to leamnpatients who can't walk first,and then help thelessons from Arabella and warn othersaboutbrother on drums,they can make quite a lot ofa comfortable position.His breathing wasn'tothers out of the building.The fire department willpotentialdanger that might be easily ignored innoise.normal,so they applied hands-on CPR.Then theyhave ambulances sent to your building.So you cankitchens.When asked about the type of mixer(Text 5)rushed him to the hospital.It was intense!move any sick or injured people to another medicalinvolved,Cathy said that was unimportant and thatW:Dad,can I give you a hand?I'll cut the vegetablesW:I can imagine!I've always wanted to dofacility immediately.Now I want to outline each ofthey just hoped this story can be a warning to othersup if you want.something like that.So I think I will be taking upyour specific responsibilities.Alicia and Arabella will continue to bake,but theyM:I've already asked Jim to do that.You could laya course like that anytime soon!参考答案will use a hand mixer and wear shower caps,"saidthe table-that's quick and easy.Or there(Text 9)L-5 BABCC6-10AABBC11-15 CBABCCathy,even if there are no written warnings onalways the washing-up to do afterwards.M:Hi and welcome to Fizz FM,your local radiostation..We've got some great news about this6-20 BCCAB21-25 BCBDC26-30 CBDDCproducts about mixing long hair and beaters.(Text 6)year's summer skills fair.Hi,Hannah,we can't31-35 CADAD36-40 AFGEC41-45 BCDACW:Hello.I'm staying in Room 509.I wanted to useyour indoor swimming pool around seven thiswait to find out what s happening.46-50 CBDAD51-55 BCADB英语周报订阅号◆◆morning,but my room key wouldn t open theW:It's taking place tomorrow.That's the 16th of56.prevented57.that/whichAugust.It s for anybody who's between thirteen58.contribution59.as60.firmlydoor to the pool.初高中英语学M:I'm sorry,but the pool's only open between theand eighteen.This year we ve got different61.players62.breaking63.writter中高考教育资讯hours of 8 am and 9 pm.classes in first aid,hairdressing and sign language64.to face65.theW.Hmm.I'm here on business,so I can onlyin Northwood Park.Classes start at 10 am and写作第在线订阅英语周报exercise early in the morning.finish at 8:30 pm.So come along标对，白柳娜羊编，刘

第十九套英语8 Modules4~6试题答案听力1~5 AABCA 6~10 ABABB 11~15 ACCCB 16~20 ACBBA阅读理解A本文介绍了4种有助于培养孩子们思维和动手能力的玩具。21.B根据Science Kit部分第2句可知，科学教育类玩具套件可以帮助孩子们学化学基础知识。22.B根据Mini Terra Kit部分可知，Mini Terra Kit模拟自然环境，做成一个微型花园，因此它适合喜欢园艺的孩子。23.D根据WeRo Kit部分最后一句可知，WeRo Kit的特别之处在于它涉及预设任务的技能。B失去双臂的残奥会运动员Hamadtou通过刻苦的训练在比赛中赢得了荣誉，验证了“有志者事竟成”的道理。24.B根据第2段最后一句可推知，正是Hamadtou的一位伙伴的言语刺激，让他决定打乒乓球，以此来证明自己。25.D根据第3段中Hamadtou说，最大的挑战是找出控制自己身体的最佳方法以及后文中他尝试用各身体部位打球可知，他最大的困难是使用合适的身体部位打球。26.A根据最后一段可知，2016年lamadtou43岁，2014年他41岁的时候，获得年度最佳运动员的称号。27.D通读全文以及最后一段可知，身残志坚的Hamadtou虽然没有双臂，用嘴叼球拍打球，通过自己的奋斗赢得了所有人的尊敬。一种无声的杀手一衣原体病正在澳大利亚树袋熊中蔓延，可能导致不育或死亡，因此树袋熊面临灭绝危险。28.D根据第1段第3句可知，对树袋熊来说，衣原体病会导致树袋熊失明和不育。29.C根据第2段可知，感染上衣原体病的树袋熊从2008年的10%上升到现在的85%，可见树袋熊正面临着极大的危险。30.B根据倒数第2段第1句可知，疫苗的有效性有待于接受进一步的检测。31.A本文介绍了衣原体病在树袋熊中蔓延，可能导致树袋熊不育，面临灭绝的危险。一群人跑得筋疲力尽，却很开心，这也许就是跑步者的兴奋点。32.D根据第1段可知，在长时间的有氧训练后人们会产生一种奇怪的兴奋感。33.B根据第1段末句和第3段可知，其他有氧运动，包括骑自行车、游泳和剧烈的徒步旅行，和跑步一样也会引发同样的反应，即产生一种兴奋感。34.C根据第4段可知，人类并不是唯一表现出跑步兴奋迹象的动物，实验发现老鼠与狗都有。·110·【23·G3DY·英语·参考答案-WYB一必考-QG】

(1)天山山脉被称为“中亚水塔”说明天山山脉可为中亚提供众多水源，原因分析应考虑水源丰富程度及对周围地区水资源供给的影响。中亚地区深居内陆，降水少，气候干旱；受地形影响，天山山脉降水较多；山地冰川训分布广泛，淡水资源蓄积量大；地势较高，是周围众多内流河的发源地和重要的水源地，对维系周边绿洲农业及生态系统的稳定和发展有重要意义。(2)水循环的类型有陆地内循环、海陆间循环和海上内循环。甲河位于天山南侧盆地地区，流域内降水极少，河流径流和地下径流来源于冰川水，蒸发旺盛，属于典型的陆地内循环；乙河位于天山北侧，受大西洋水汽的影响，降水较多，补给来源多，河流径流量较大，且最终注入北冰洋，属于海陆间循环。(3)由材料可知，山地冰川融化对河流径流有很大影响，故可推断补给类型不同、径流变化不同。河位于天山南侧，深居内陆，远离海洋，降水稀少，以冰雪融水补给为主，全球气候变暖，使得冰雪融水增加，N河出山径流量增加较多；M河位于天山北侧，受来自于大西洋的水汽影响，降水相对较多，再加上有地下水、冰雪融水的补给，则M河出山径流量受冰雪融水影响较小，故出山径流量较N河增加少。(4)注意“地下水库”和“山前洪积扇”，其原理与地下坎儿井相似。在该区域山前洪积扇建设地下水库的理由，可从自然环境、积水量以及水资源的保存等方面进行分析。该区域为内陆干旱地区，水资源短缺；洪积扇由砾石、沙粒组成，沉积物巨厚，有利于地下水储藏；地下水库较原水库蒸发损失量少，且水质优良，可提供生产、生活用水等。12.(1)伏尔加河流域大部分为温带大陆性气候，水源补给主要为季节性积雪融水补给；流域冬季时间长，气温低，积雪量大，春季气温回升，积雪融化，径流量丰富。(2)水位季节变化大；春季水位快速上升，夏季水位高；秋季水位降低，冬季水位低。(3)里海为咸水湖，里海是卡拉博加兹戈尔湾最主要的补给来源（里海南部含盐量较高的湖水通过沙洲中部的狭窄水道补给卡拉博加兹戈尔湾)；该地区气候干旱，降水稀少；该地区夏半年气温高，全年风力强劲，蒸发旺盛；海湾较封闭，与里海水体交换缓慢；沿岸无河流注入，盐度得不到稀释。(4)里海水位上升；里海含盐量升高里海周边地区的沿海低地被淹没；卡拉博加兹戈尔湾面积迅速萎缩；卡拉博加滋戈尔湾盐产量减少；湖床大面积裸露，引发沙尘暴(盐尘暴)。

绝密★启用前高中学业水选择性考试冲刺试卷（四）地理时量：75分钟满分：100分命题人：江新审稿：长沙市一中一、选择题：本题共16小题，每小题3分，共48分。在每小题给出的四个选项中，只有一项是载至2021年底安徽省常住人口约6100万。出生人口“整体呈断崖式下降趋势”，这样的符合题目要求的。重话出现在《安微省人口与计划生育冬例（修订草案征求意见稿）》的说明中，安徽省的情况也是我国近年来人口出生状况的一个缩影。下图示意2017一2021年安徽省出生人口情况。据此，完成1一2题。万人1006040220172018201920202021年□出生人口1.据图可知，2017~2021年安徽省A,人口年自然增长率为负值B.2017年净增人口数量最多C.常住人口总数量逐年减少D.出生人口年增长率为负值2.鉴于目前安微省人口形势，以下建议合理的是①全面取消计划生育政策②落实三孩生育政策的配套支持措施③提倡适龄婚育、优生优育④采取措施减轻人口生养和教育负担A④②③B.①②④C.②③④D.①③④位天南纬20°韭洲某地，当地居民建造了一种形似蜂巢的独特建筑（右图），这种建筑的框架由小树苗弯曲形成圆形的顶部，通体覆盖着紧密编织的干草。据此，完成3~4题。3.当地主要的地带性植被类型BA.热带雨林B.热带稀树草原C.热带荒漠D.温带草原4.下列原因，与该独特建筑关联较小的是A.隔热B.防潮湿C,经济水低D.原料充足，就地取材【高中学业水选择性考试冲刺试卷（四）·地理第1页（共6页）】

(Text 6)W:What have you been doing?M:I've been working really hard.Sometimes I go round to Lucinda's place and we study to-gether.W:Lucinda?I haven't heard about her before.Who is she?M:You know Lucinda.I'm sure I've told you about her.I've known her for ages.We oftenhelp each other with work.Sometimes we go to the pub or cook a meal together.Todaywe've been testing each other on economics and marketing.That's tomorrow's exam.She's gone out to get a Chinese takeaway.Oh,Lucinda's just come back with the food.I'llring again before I come home.Love to Dad.(Text 7)W:Do you know anything about Dr Miller's classes?M:Yes.Are you in his class?W:No.I'm taking his class next term.M:He is very serious and patient.He is really clear what you need to learn to get a goodgrade.But he is very strict about homework.Are you willing to study hard?W:Yes,I guess so.M:What I like most about him is that he is a teacher who always understands others.Do youenjoy that in a teacher?W:Yes,I had such a teacher before.M:Did you know that he came to England last year after 10 years of teaching in America?W:No,I didn't,but that could be a good thing.M:Well,take a look at everything and work out what is best for you.Good luck!(Text 8)W:Sometimes I just can't figure out why some people always buy famous brands such as LVor Gucci.They're not very good value for money.What do you think about that,Tom?M:Maybe they think that famous brands can make them feel good.You know,producers offamous brands spend a lot of money on their advertising.They want people to know thatthey are offering the best.W:I can understand the influence of advertisements on people.Some people do not make thatmuch money but spend half of their incomes on famous brands.M:Oh,I see.Some people probably need to wear brand-name clothing to make themselvesunique and fashionable.They don't want to be a nobody in the crowd.W:Well,that's one of the reasons why they spend so much.They want to keep up with chan-ging fashions,so they buy them regardless of the price.M:As far as I am concerned,I will buy things of high quality at reasonable prices.There arealso many cheap things with good quality.I never want to be a victim of advertisements.W:I couldn't agree more.$·118·【23·G3DY·英语·参考答案-WYB一必考-QG】

32.D根据第1段最后一句可知，网络销售的明显增长、电子书的普及对实体书商来说都是极大的挑战。33.C根据第2段最后一句可知，作者夫妇坚持开实体书店是因为他们想与更多志同道合的人分享对好书的热爱和阅读的乐趣。34.B通读第3、4段可知，作者夫妇成立了图书俱乐部，建立了自己的网站，并捐赠图书给撒哈拉以南非洲地区，文章并未提到作者夫妇给消费者赠送礼物。35.A根据最后一段最后一句可知，尽管面临很大的压力，书籍供应商在市场仍有一席之地。由此可知，作者认为做书籍供应商虽然艰难但值得一试。补全短文36~40 GFACE完形填空身患高血压的作者在渐渐好转之后打算把母亲送给自己的血压计在网上出售，结果见面时发现买家经济状况不好，最后把血压计送给了买家。41.C医生说作者患有高血压，所以母亲给作者买了一个血压计。42.B母亲给作者买血压计来实时追踪记录血压情况。43.B几十年以来，作者一直在和疾病作斗争。44.C根据上下文可知，作者通过静坐疗法、自我问诊、锻炼及调整饮食渐渐地从疾病中康复过来。45.D巾于作者身体好转，不需要血斥计了，因此这里填happy。46.A固定搭配be in good condition“情况良好”。作者妈妈身体状况好，根本不需要它。47.D根据上下文可知，此处表示经济状况不好。48.C因此，作者决定挂在网上出售。49.D根据下文可知，此处表示作者发布在网上的消息得到了回复。50.B51.A作者去了一家咖啡店并且见了她。52.C根据上下文可知，她小心翼翼地从钱包里拿出一些钱付给作者。53.D此处考查固定句式It struck sb that...·。54.B作者悄悄地把它塞进包里。55.D根据上下文可知，此处表示努力做某事而没成功。她很困惑，又想把钱递还给作者。56.A此处表示激动的，和后面的thanked一致。她激动不已，并表示感谢。57.B根据常识，离别时祝福别人健康、幸福。58.℃根据下文可知，作者没有用现金报答妈妈。59.A作者非常高兴把礼物送给真正需要的人，以此来回报母亲。60.D语法填空61.worried 62.consider 63.rented 64.and 65.becomes 66.enjoyably 67.a·70大【23·G3DY·英语·参考答案一R一必考一Y】

绝密★启用前5.已知椭圆C和双曲线C2有公共焦点F(一c,0),F2(c,0),C1和C,在第一象限的交点为P,斯2021一2022学年度高三二轮复考点测试卷（五）数学·解析几何∠F,P℉，=乏，且双曲线C,的虚轴长为实轴长的2倍，则椭圆C的离心率为()(考试时间40分钟，满分100分)A.213◇、选择题（本题共5小题，每小题6分，共30分.在每小题给出的四个选项中，只有一项是符合二、选择题（本题共3小题，每小题6分，共18分.在每小题给出的选项中，有多项符合题目要题目要求的)如求.全部选对的得6分，部分选对的得3分，有选错的得0分)人若双曲线号y4=1(a>0)的离心率为√3，则双曲线的实轴长为6.已知直线l1:(a+1)x十ay+2=0,l2:ax+(1一a)y-1=0,则下列结论正确的是()%A.√2B.2√2C.√0D.2√10A.l1恒过点(2，一2)B若/，则a-号邮2.已知抛物线y=mr(m>0)上的点(，2)到该抛物线焦点F的距离为号，则m=C.若l1⊥l2,则a2=1D.当0≤a≤≤1时，l2不经过第三象限◇7.已知方程mx2十ny2=1(m,n∈R),则下列说法正确的是()A.2B.1cDA.当m>n>0时，方程表示椭圆，其焦点在y轴上3.过点M(0,一4)作直线l与圆C:x2十y2十2x一6y+6=0相切于A,B两点，则直线AB的方B.当m=n>0时，方程表示圆，其半径为Wn螺程为()C当mm0,b>0)的右支的一部分，且与y轴及行于x轴的两条直线围成的曲边四边形ABMN绕B.以线段BM为直径的圆与y轴相切y轴旋转一周得到的，若该金杯主体部分的上口外直径为10,3，下底座外直径为23丽，且杯身33C当AF=2BF时，AB1=号最细之处到上杯口的距离是到下底座距离的2倍，则杯身最细之处的周长为◇D.AB|的最小值为4妆三、填空题（本题共2小题，每小题6分，共12分》棕9.双曲线C的中心为坐标原点，焦点在坐标轴上，且一条渐近线过点(1,2)，写出一个符合上述為条件的双曲线C的方程为A.2W2πB.3πC.2√3πD.4元10.已知点P在抛物线y=4x上，点Q在圆(x一5)2十y=1上，则|PQ的最小值为数学·考点测试卷（五）第1页（共4页）数学·考点测试卷（五）第2页（共4页）

·x+T∈「21≤g(x)≤2.令g(x)=t,则1≤t≤2.那么：66’3[g(x)]-mg(x)=2=0,可得：-+2=0成立即m=t+2≥22，当1=V2时取等号，t.m的最小值为2√2.当t=1或2时，可得m=3,即m的最大值为3.故得实数m的最大值为3，最小值为2√2，8)不等太号)g-小>a-2i陵立.即sm+}+2加nx->a-2恒成立石若a=0时，显然s如x+写-2恒成立若a>0时，当x=号，时simx+号+2 asin-取得最小值.6即sin管+}-2asm骨写）>a-2成这可：-2>a-2,解海：0a23取得最小值.即sin+写}2asm5}a-2成立：a2,-2

19.【答案】B【解析】A.分子式为CH2的烷烃有正戊烷、异戊烷和新戊烷3种，含有3个甲基结构的为2-甲基丁烷，即异戊烷，只有一种，A项错误；B.乙烷与氯气在光照下反应、乙醇与乙酸的酯化反应、溴乙烷在NOH溶液中的水解、苯与液溴或浓硝酸的反应均属于取代反应，B项正确；C.甲烷、苯都属于烃，甲烷不存在同分异构体，但苯存在同分异构体，如CH=C一CH2一CH2一C=CH、CH3一C=C一C=C一CH3、CH2=CH一CH=CH一C=CH等，C项错误；D.甲烷的含氢量较大，相同质量时消耗的氧气的量较多，D项错误。三、必做非选择题20.(15分)【答案】(1)冷凝管或球形冷凝管(1分)导出CL2、HC1气体，冷凝回流甲苯(2分)(2)饱和食盐水(2分)(3)使漏斗与烧瓶内压强一致，从而使液体顺利流下(2分)(4)2Mn04+10C1+16H+—2Mn2++5Cl2↑+8H,0(2分)》(5)178.8~205(2分)(6)①97.3(2分)》②样品可能混有二氯化苄、三氯化苄等杂质(2分)【解析】(1)根据装置图可知，仪器E的名称是球形冷凝管；球形冷凝管的作用是导出Cl2、HCl气体，冷凝回流甲苯。(2)装置A制取的氯气中含有杂质氯化氢，装置B的作用是除去氯气中的氯化氢，所以装置B中的试剂是饱和食盐水。(3)用恒压滴液漏斗代替分液漏斗的优点是使漏斗与烧瓶内压强一致，从而使液体顺利流下。(4)装置A中高锰酸钾与浓盐酸反应生成氯化钾、氯化锰、氯气和水，反应的离子方程式为2Mn04+10C1-+16H+—2Mn2++5CL2↑+8H,0。(5)分馏出氯化苄温度应高于氯化苄的沸点，低于二氯化苄的沸点，所以应选择温度范围是178.8~205℃。(6)①设样品中C6HCH,Cl的质量为xg。C.H CH2 CI~AgCl126.5143.5.100xg2.87×208x=265,样品纯度为品6×100%≈97.3%。②二氯化苄、三氯化苄中氯元素的质量分数大于氯化苄，样品若混有二氯化苄、三氯化苄等杂质，会使测量结果偏高。21.(12分)【答案11)(N0)C)(2分)2AH,-AH,(2分)c4(N02)(2)2.5×10-3mol·L-1·min-1(2分)10(2分)高二·化学参考答案及评分标准第5页（共8页）