2019届一轮复习人教版选修六Unit3Ahealthylife单元学案设计（25页word解析版）

2019届一轮复习人教版选修六Unit3Ahealthylife单元学案设计（25页word解析版）

‎2019届一轮复习人教版选修六 Unit 3A healthy life单元学案设计　‎ ‎【课前预习】‎ Ⅰ.情景默写 ‎1.The most awkward(笨拙的)email mistake is usually committed in anger.(2017·天津卷) ‎ ‎2.Typically，the preferred sleep cycle is delayed in adolescents(青少年)，which leads to many students not feeling sleepy until much later in the evenings.(四川卷) ‎ ‎3.The man had so little education that he was unfit (不合适) for this job.‎ ‎4.The court has yet to pass judgement (判决) in this case.‎ ‎5.It’s illegal (非法的) to carry guns in our country.‎ ‎6.I’ve never felt so embarrassed (尴尬的) in my life.‎ ‎7.They were accused of abusing (滥用) their power to keep prices artificially high.‎ ‎8.At one time，she is fine，but at another，she is abnormal__(异常的).‎ ‎9.According to the law，drivers who are drunk are banned (禁止)from driving.‎ ‎10.If you keep on ignoring the teacher’s advice，you will get__into(陷入)a situation where you fall behind others in all subjects.‎ ‎11.Most of them turned up on time; only Tom arrived late due__to ‎(由于)the storm.‎ ‎12.Addicted__to(成瘾)playing the violin，he didn’t find a thief walk into his house.‎ ‎13.In__spite__of(尽管)the bad weather，I had fun meeting friends and relatives.‎ ‎14.He doesn’t want to take__risks(冒险)of losing his job，especially since he became the main source of family’s income.‎ ‎15.She has been__accustomed__to (习惯)getting up early every day.‎ ‎16.It is sunny today，and we feel__like(想要)going out to have a walk.‎ Ⅱ.词性转换 ‎1.Modern trains have automatic doors，which can open and close automatically(automatic).‎ ‎2.Even though the work offers such tiring mental labour，he never feels mentally__ tired.(mental)‎ ‎3.To the father’s __disappointment，his disappointing son made him disappointed.(disappoint)‎ ‎4.Having climbed the stairs，the old man was out of breath，and he found that it is hard to breathe smoothly.(breath)‎ ‎5.It is necessary we master some basic skills，which will greatly increase our chances of survival.Luckily，I survived the terrible car crash last week and I was the only survivor of the accident.(survive)‎ ‎6.We all agreed on an idea to strengthen (strength) the cooperation ‎ between our two parties.‎ ‎7.Tom’s parents are worried that he is addicted to the computer games which are addictive to children.(addict)‎ ‎8.The man in the river desperately tried to reach the side.The situation was desperate but not hopeless.(desperate)‎ ‎9.After a stressful week of work，all the employees were extremely stressed and tired.They complained that few could work efficiently under stress.(stress)‎ ‎10.After hearing some relaxing music，she felt quite relaxed,__and there was relaxed expression on her face.(relax)‎ ‎11.As we all know，everyone has both strengths and weaknesses.Therefore，we shouldn’t look down upon whoever looks weak.(weak)‎ ‎1.句型公式：it seemed certain that...‎ 从某种程度上看，他们的飞机肯定坠毁了。‎ At one point, it__seemed__certain__that__their__plane__had__crashed.‎ ‎2.句型公式：find＋it＋adj.＋to do 我们发现很有必要努力工作来实现我们的梦想。‎ We find__it__necessary__to__work__hard to achieve our dream.‎ ‎3.句型公式：感叹句 摆脱这个坏习惯是多么的困难！‎ How__difficult__it__is to get rid of the bad habit!‎ ‎4.句型公式：neither...nor...‎ 他既不抽烟也不喝酒。‎ Neither__does__he__smoke，nor does he drink.‎ ‎5.句型公式：what引导的名词性从句 我们最需要的是科普书。‎ What__we__need__most are popular science books.(浙江卷·写作)‎ ‎6.句型公式：it is/was time to do...‎ 妈妈说洗手吃饭的时间到了。‎ Mom said it__was__time__to__wash__hands__and__have__lunch.‎ ‎7.句型公式：as＋adj.＋ a/an ＋单数可数名词＋as 尽管汤姆和我一样是个老烟枪(a heavy smoker)，但他去年确实戒烟了。‎ Although Tom was__as__heavy__a__smoker__as__me，he did give up smoking last year.‎ ‎8.句型公式：so＋助动词＋主语 我哥哥观看了决赛，我也是。‎ My brother watched the final，and so__did__I.‎ ‎9.句型公式：every time引导时间状语从句 我每次见他，他总是面带微笑。‎ Every__time__I__meet__him，he always wears a smile.‎ ‎10.句型公式：强调句型 正是当我到达电影院后我才意识到我把电影票忘在家里了。‎ It__was__when__I__arrived__at__the__cinema__that I realized I had left my ticket at home.‎ 第一板块 重点单词 ‎1.stress n.重压；逼迫；压力；重音；重点 vt.加压力于；使紧张；重读 高考必刷题练透 单句语法填空/一句多译 ‎①Things can easily go wrong when people are under stress.‎ ‎②Cooperation or teamwork，the importance of which is__stressed(stress)，plays an important part in football matches.‎ ‎③It is also a virtue to forgive and forget，especially in such a competitive and stressful (stress) society.‎ ‎④他强调了接受良好教育的重要性。‎ ‎④－1 He stressed__the__importance__of a good education.(stress v.)‎ ‎④－2 He laid/placed/put__stress__on a good education.(stress n.)‎ ‎④－3 Stress was__laid/placed/put__on a good education by him.(被动语态)‎ 状元笔记全记牢 ‎(1)under stress在压力之下 under the stress of 在……压力下 put sb under great stress 使某人感到沉重的压力 lay/place/put stress on sth 强调某事物 ‎(2)stress the importance of 强调……的重要性 be stressed out 筋疲力尽的 ‎(3)stressed adj. 感到压力的 stressful adj. 产生压力的 ‎2.addicted adj.入了迷的；上了瘾的 高考必刷题练透 ‎(1)单句语法填空 ‎①Many kids are addicted to surfing (surf) the Internet，and so they have lost interest in study. ‎ ‎②Many kids addict themselves (they) to surfing the Internet，and so they have lost interest in study.‎ ‎(2)句型转换(把练习①②改成分词短语状语)‎ ‎③Addicted to surfing the Internet，many kids have lost interest in study.‎ ‎④Addicting themselves to surfing the Internet，many kids have lost interest in study.‎ 状元笔记全记牢 ‎(1)be/become/get addicted to (doing) sth 沉溺于……；专心做……‎ ‎(2)addict vt.　使沉溺；使上瘾 addict oneself to sth 沉溺于……‎ ‎(3)addict n. 有瘾的人 a work addict 工作狂 ‎(4)addiction n. 沉溺；嗜好；吸毒成瘾 addictive adj. 使人上瘾的 ‎【点津】“addict；addicted；addiction”等在表示“沉迷于/热衷于……”时，都和介词to连用。‎ ‎3.accustomed adj.经常的；惯常的；习惯了的 高考必刷题练透 ‎(1)单句语法填空 ‎①I am accustomed to getting(get)up late，and I always feel sleepy.‎ ‎②I accustom myself (I) to getting up late，and I always feel sleepy.‎ ‎(2)句型转换(把练习①②改成分词短语状语)‎ ‎③Accustomed__to__getting__up__late，I__always__feel__sleepy.‎ ‎④Accustoming__myself__to__getting__up__late，I__always__feel__sleepy.‎ ‎(3)微写作 ‎⑤他很快适应了大学里的浓厚的(strong)学术氛围(academic atmosphere)和丰富多彩的(colorful)活动。(广东卷)‎ He__quickly__got__accustomed/accustomed__himself____to__the__strong__academic__atmosphere__and__colorful__activities__in__the__college.‎ 状元笔记全记牢 ‎(1)be/get/become accustomed to (doing) sth　习惯于(做)某事 ‎(2)accustom vt. 使习惯于 accustom sb/oneself to (doing) sth 使某人/自己习惯于……‎ ‎【联想】　含有介词to的动词短语：‎ ‎①devote oneself to奉献　②get down to开始认真做 ‎③see to务必；一定 ④give way to对……让步 ‎⑤look up to尊敬 ⑥lead to导致；通向 ‎⑦stick to坚持 ⑧be opposed to反对 ‎4.effect n.结果；效力 高考必刷题练透 单句语法填空/微写作 ‎①It’s reported that this regulation will come into effect from September 1.‎ ‎②Besides，developing a good habit of learning can help you improve your learning effectively__(effect).(江西卷)‎ ‎③Go outdoors and play team games with your friends as physical exercise is an effective__(effect) way to get rid of anger.‎ ‎④我写信告诉你中国长江江豚正面临灭绝，因为人类活动对它们产生不利的影响。(重庆卷)‎ I am writing to tell you that the finless porpoise is becoming extinct because humans’__activities__have__a__bad__effect__on__them.‎ 状元笔记全记牢 ‎(1)have an effect on/upon　对……产生影响 come/go into effect 生效 in effect 事实上；实际上 side effect 副作用 ‎(2)effective adj. 有效的；有影响的 effectively adv. 有效地 ‎(3)affect vt. 影响 ‎【点津】‎ have an effect on/upon的同义短语：‎ ‎①have an influence on/upon ‎②have an impact on/upon ‎5.due adj.预定的；到期的；应付的；欠款的 高考必刷题练透 写出下列句中due的含义/单句语法填空 ‎①That money is due to me，but I haven’t got it yet.欠款的 ‎②She is due to make a speech on the economy next week.预定的 ‎③The books must be returned before the due date or the kid can not borrow other books.到期的 ‎④A great deal of money is due __to you; please give me your bank account.‎ ‎⑤It is said that the spaceship is due to__arrive(arrive)three days later.‎ 状元笔记全记牢 due to　由于；因为；归因于 be due to do sth 预定做某事 be due to sb 应付给/给予某人 be due for sth 应用某物；应得到某物 ‎【联想】　表示“由于；因为”的其他短语：‎ on account of，because of，as a result of等。‎ 第二板块 核心短语 ‎1.get into陷入；染上(坏习惯)‎ 高考必刷题练透 完成句子 ‎①I’ve got__into__the__habit__of calling in on my grandparents on my way home from school.‎ 我已养成了在放学回家的路上看望祖父母的习惯。‎ ‎②A smile can help us get__through__difficult__situations and find friends in a world of strangers.‎ 微笑可以帮助我们渡过难关，并在陌生人中找到朋友。‎ ‎③After Christmas I’m going to get__down__to__some serious job－hunting.‎ 圣诞节后，我打算开始认真地找工作。‎ ‎④Such people always stick to their views，even if it means that they__may__get__into__trouble.‎ 这种人总是坚持自己的观点，即使这意味着他们可能会陷入困境。‎ 状元笔记全记牢 get into the habit of　养成……的习惯 get into trouble/debt 陷入麻烦/债务 get across (使)通过；(使)被理解 get along with 进展；相处 get away 逃脱；离开 get over 爬过；越过；克服困难；痊愈 get through 穿越(马路)；通过；接通电话 get down to 开始做某事 ‎2.take risks (a risk)冒险 高考必刷题练透 对比填空(at risk，at the risk of)/一句多译 ‎③他不能冒险失去这一次好机会。‎ ‎③－1 He__could__not__take__a__risk/risks__to__lose__the__good__chance.(risk n.)‎ ‎③－2 He__could__not__take/run__the__risk__of__losing__the__good__chance.(risk n.)‎ ‎③－3 He__could__not__risk__losing__the__good__chance.(risk v.)‎ 状元笔记全记牢 ‎(1)take/run the risk of doing sth冒险做某事 take risks/a risk to do sth 冒险做某事 at risk 有风险；处境危险 at the risk of... 冒着……风险 ‎(2)risk v. 冒……的危险 risk doing sth 冒险做某事 第三板块 经典句式 ‎1.I do__hope__so because I want you to live __as__long__and__healthy__a__life as I have.‎ 我的确希望如此，因为我想让你和我一样活得健康长寿。‎ 高考必刷题练透 单句改错/微写作 ‎①I strongly feel that whatever our friends have done do matter to us.do→does ‎②I’m not a little tired today after giving the room a thorough cleaning and I have never had as more tiring a day as today.去掉more ‎③It is too difficult job for me to finish in so short a time.job前加a ‎④预习课程、课堂上积极参与以及课后复习的确让我受益匪浅。(江西卷)‎ It__did__benefit__me__a__lot to preview lessons，get actively involved in class and review what had been taught after class.‎ 状元笔记全记牢 ‎(1)“do/does/did＋动词原形”构成强调句，意为“确实；的确”，用来加强谓语动词的语气。使用条件：‎ ‎·句子是肯定句 ‎·句子的时态为一般现在时或一般过去时 ‎(2)句中使用了一个原级比较结构：so/as＋adj.＋a(n)＋n.＋as，意为“和……一样……”。‎ ‎(3)类似此句型用法的还有：too/so/how＋adj.＋a(n)＋n.。‎ ‎2.When I was taken off the school football team because I was unfit，I knew it__was__time__to quit smoking.‎ 当因为我不再适合而被学校足球队开除以后，我意识到自己是时候戒烟了。‎ 高考必刷题练透 单句语法填空/一句多译 ‎①It was three years before they got married.‎ ‎②It is 3 years since he left，and I don’t know how soon he will come back.‎ ‎③It is the first time that he has__visited (visit)it.‎ ‎④It was the first time that he had__visited(visit) it.‎ ‎⑤是你该采取有效措施的时候了。‎ ‎⑤－1 It__is__time__for__you__to__take__effective__measures.‎ ‎⑤－2 ‎ It__is__time__that__you__should__take/took__effective__measures.‎ 状元笔记全记牢 It is/was time to do sth“是该做某事的时候了”。‎ 结构 从句谓语动词 含义 It’s time＋(that)...‎ did或should do 是该做某事的时候了 It is＋...＋since 一般过去式 做某事有多长时间了 It was＋...＋since 过去完成时 做某事多长时间了 It is the first time＋that 现在完成时 某人第一次做某事 It was the first time that 过去完成时 某人第一次做某事 It was (not)＋...＋before 一般过去式 ‎(没)过多久就……‎ It will (not) be＋...＋before 一般现在式 ‎(没)过多久就……‎ ‎【课堂过关】‎ Ⅰ.课文语法填空 It’s easy for you to start smoking，but once you become 1.addicted (addict) to it，you may find 2.it difficult to quit.Firstly，you may become 3.physically (physical) addicted to nicotine，a harmful chemical in cigarettes.4.Secondly (second)，you may develop the habit of smoking and become mentally addicted to it，5.believing (believe) that you will ‎ only feel good when you smoke.Smoking may have all kinds of harmful effects on the 6.health (healthy) of both the smokers themselves and non－smokers around them.It not only affects your fitness，7.but does harm to your heart and lungs and causes a variety of diseases.Being a smoker，the offensive smell and 8.appearance (appear) of you may drive people around you away.So，it’s important for one to quit smoking and live a healthier life.To quit smoking，you’d better make 9.a list of the things you need to do.It’s your strong will 10.that counts.‎ Ⅱ.课文短文改错 HIV is a virus that weaken a person’s immune system.You can have a HIV in your blood for a long time.However，eventual it will damage your immune system so much as your body can no longer fight disease.This stage of the illness was called AIDS.So far，almost everyone who has developed AIDS died.HIV is spread through blood or the fluid where carries the virus.The virus gets inside the body through breaking skin，or by injection.Certainly，scientists will find a cure to HIV/AIDS one day.But before that happens，you need to protect myself.‎ 答案 HIV is a virus that a person’s immune system.You can have HIV in your blood for a long time.However， it will damage your immune system so much your body can no longer ‎ fight disease.This stage of the illness called AIDS.So far，almost everyone who has developed AIDS died.HIV is spread through blood or the fluid carries the virus.The virus gets inside the body through skin，or by injection.Certainly，scientists will find a cure HIV/AIDS one day.But before that happens，you need to protect .‎ Ⅲ.单元要点微写作 根据下面提示写一篇60词左右的短文介绍网络游戏对孩子的影响。‎ 越来越多的孩子整日沉溺于网络游戏，这对他们有很坏的影响。一旦他们养成这个习惯，就不容易摆脱掉，这让他们很难适应日常生活。老师和家长都应该强调学习的重要性，禁止他们玩这样的网络游戏。‎ ‎【参考范文】‎ More and more children are addicted to the Internet games all day，which will have a bad effect on them.Once they form the habit，they won’t quit it easily，which makes it difficult for them to get accustomed to the daily life.In my opinion，the teachers and parents should stress the importance of study，and ban them from playing such Internet games.‎ ‎【课后检测】‎ A Internet addiction (上瘾)，in today’s world，is so common that some of you may not even consider it addiction.While the Internet has lots of benefits，it can also badly affect the users’ mind and health.Understanding how to get over your Internet addiction can help you lead a healthy life.‎ Develop a hobby Developing a hobby helps keep your mind off the Internet.In fact，if you have a hobby，the chances of getting addicted to the Internet reduce greatly.Learning to play an instrument，painting，singing，dancing，ect.，can be of great help to keep you in a positive(积极的) state.When you are doing something you really love，your mind becomes relaxed and more focused(集中精力的).A hobby will not only help you get over your Internet addiction but also change your life attitude.‎ Use reference books(工具书)‎ These days，most students make use of Internet sources to do homework.However，using ready－made notes to do your homework will not only make you lazy and addicted to the Internet，but also stop you from developing your analytical(分析的) ability.Students must be encouraged to do their homework using reference books.The process of reading and analyzing information helps sharpen their mind and keep them from getting addicted to the Internet.‎ ‎________‎ Going to bed early is one of the most effective ways of getting over Internet addiction.Once we get into the habit of sleeping late，we will search for things to do online.By going to bed early，you can get over this addiction and keep your mind and body in a healthy state.‎ ‎【语篇导读】　本文作者给出三条戒除网瘾的建议。‎ ‎1.The author believes that Internet addiction ________.‎ A.will disappear naturally B.is seldom seen nowadays C.is a problem that can be solved D.is of great benefit to some people 答案　C　[根据文章第一段中的Understanding how to get over your Internet addiction can help you lead a healthy life可知，作者认为网瘾是可以戒掉的。]‎ ‎2.According to the passage，using reference books can ________.‎ A.help students relax B.save students more time C.improve students’ ability D.provide students with ready－made notes 答案　C　[根据作者给出的第二条建议可知，学生们在写作业时过于依赖网络不仅会让他们变得懒惰，而且还会阻碍他们分析能力的发展。相反，使用工具书可以让他们的思维在查找信息和分析信息的过程中变得更加敏锐。]‎ ‎3.What can be put into the blank in the passage?‎ A.Get rid of bad habits.‎ B.Have a good sleeping habit.‎ C.Keep your mind and body healthy.‎ D.Surf the Internet only in the daytime.‎ 答案　B　[作者在第三条建议中建议养成良好的睡眠习惯。每天早睡既可以减少上网的时间，又可以保持健康，由此可知B项是本段的段落大意。]‎ ‎4.The main purpose of the passage is to ________.‎ A.show how to use the Internet properly B.discuss the bad effects of Internet addiction C.explain why people have Internet addiction D.give advice on getting over Internet addiction 答案　D　[本文中作者主要给出三条戒除网瘾的建议。]‎ B Have you ever been in a position where you were expected and required to take music lessons even though you had no interest?‎ The situation was this: my father was a music teacher.My mother was a piano player and，in fact，the whole family was very musical.I was the only one who didn’t know how to play a musical instrument.‎ And，as a lot of families do，I was required to take piano lessons even though I had no interest in learning how to play it.So，it ‎ started.Lesson after lesson I suffered.Finally，I just quit practicing and my piano teacher told my parents that I was hopeless.Great—no more piano lessons.‎ But my parents still thought that I should learn a musical instrument.In their opinion，having no interest in playing the piano didn’t mean that I had no interest in other instruments.So they chose some other instruments for me，but the__same__things happened.It seemed that I was a bit headstrong (任性的) but，at the same time，I knew what I wasn’t interested in.‎ The musical story didn’t end here.It went on to where I decided what I wanted to learn—to play the drums.I loved playing the drums and played in several bands.‎ The point is this: if you are not ready to do something，you won’t do it no matter how much someone else wants you to do it.Or，at the very least，you will certainly not put your heart and soul into it and will surely fail.‎ Think now what you really love doing and get down to it.‎ ‎【语篇导读】　本文是记叙文。作者用自己的亲身经历告诉我们：我们应该做自己喜欢做的事情。‎ ‎5.For the author，the piano lessons were probably ________.‎ A.interesting B.boring C.difficult D.necessary 答案　B　[细节理解题。根据文章第三段的内容可知作者对钢琴课不感兴趣，所以在他看来，钢琴课是很无聊的。]‎ ‎6.What does the underlined part “the same things” refer to?‎ A.The author refused to learn the instruments his parents chose for him.‎ B.The author’s parents thought it important to play an instrument.‎ C.The author’s parents knew nothing about the author.‎ D.The author had to learn other musical instruments.‎ 答案　A　[细节理解题。根据文章第四段中的内容可知，虽然作者放弃了学钢琴，但是他的父母仍然想让他学一门乐器，于是他们又给作者挑选了别的乐器，但是作者都不学，由此可知“the same things”指的就是作者对于父母给他挑选的其他的乐器同样都没有去学。]‎ ‎7.In the author’s opinion，if you are forced to do what you don’t like，________.‎ A.you still need to put your heart and soul into it B.you’ll like it as long as you make an effort C.you’ll know what you really want D.it’s very unlikely that you will do it well 答案　D　[细节理解题。根据文章倒数第二段的内容可知，作者认为一个人很难把一件自己不喜欢的事情做好。]‎ ‎8.What can be used as the best title of the passage?‎ A.Enjoy your life B.How to know yourself C.My musical story D.Interest is the best teacher 答案　C　[标题归纳题。作者通过自己小时候学习乐器的亲身经历告诉我们：每个人都应该去做自己喜欢的事情。由此可知C项作为文章标题最佳。]‎ C In the 19th century，doctors tried to transfuse (输入) blood to patients who had lost blood in accidents to try and save them.However，in most cases there was a horrible reaction.When the blood from the donor mixed with the patient’s own blood，it clotted (凝结) almost immediately.That stopped the circulation and the patient would die of anaemia (贫血).‎ Born on June 14th 1868，Karl Landsteiner，a doctor in Vienna，was very concerned about this.He knew there was something in the blood that caused reactions，but some people did manage to escape.Perhaps different people had different kinds of blood? He got a lot of blood samples from people，and mixed and matched them，to find out who was safe for whom，and who wasn’t.And he found that people did indeed have different kinds of blood.In fact，there were four groups.Now we call these blood groups A，B，AB and O.‎ All our red blood cells have sugar molecules (糖分子) that are stuck on their surfaces.The red blood cells of people with group A have one ‎ kind of sugar，while those with B have another.People with AB have both of these while people with O have none.‎ People with A blood group have a chemical called anti－B，while those of B blood group have anti－A in their serum (血清).People with AB group have neither anti－A nor anti－B，while people with O have both.If you were B group and got blood from an A person，the anti－A in your blood would cause all the cells with A－sugar on them to clot immediately，stopping the circulation of blood.‎ In 1907，Dr.Reuben Ottenberg carried out the first ever safe blood transfusion by matching blood groups.Blood transfusion became quite common in the following years.It helped save thousands of lives in the First World War.‎ ‎【语篇导语】　医生在给病人输血时，血型匹配是一个重要的原则。本文介绍了人类不同的血型是如何被发现的。‎ ‎9.What does the text mainly talk about?‎ A.Who Karl Landsteiner is.‎ B.The discovery of blood groups.‎ C.The importance of safe blood transfusion.‎ D.The application of blood transfusion in medicine.‎ 答案　B　[主旨大意题。全文主要讲述了Karl Landsteiner是如何通过实验发现了人类的不同血型的，故选B项。]‎ ‎10.According to the text，Landsteiner’s experiment was inspired by ‎ ________.‎ A.certain successful cases of blood transfusion B.the newly－discovered cause of some patients’ death C.the medical accidents he dealt with D.some doctors in the 19th century 答案　A　[细节理解题。从第二段“...but some people did manage to escape...and mixed and matched them.”可知，A项就是“some people did manage to escape”的同义转述。输血虽然危险，但还是有成功的概率，因此Landsteiner决定做实验来证实自己的猜测。]‎ ‎11.In which of the following groups can “anti－B” be found，according to the text?‎ A.Only in A blood group.‎ B.Only in B blood group.‎ C.Only in AB blood group.‎ D.In blood groups of A and O.‎ 答案　D　[细节理解题。根据倒数第二段中“People with A blood group...while people with O have both.”可知，只有A和O这两个血型中存在化学物质anti－B，因此D项正确。]‎ ‎12.From the text，we know that ________.‎ A.before the 19th century，no blood transfusion was carried out B.the first successful blood transfusion was done by Ottenberg C.sugar molecules make blood group O different from the others D.it was Landsteiner who named blood groups A，B，AB and O 答案　C　[细节理解题。在A、B和AB型的血液中，其红细胞含有两种糖分子(sugar molecules)，唯独O型血糖分子与之不同，因此C项表述正确；其他三项则均是对原文相关细节的误解。故选C项。]‎