2019-2020年高中英语 Unit 2　Cloning Using Language课时作业（含答案分析）新人教教版选修8.doc

2019-2020年高中英语 Unit 2Cloning Using Language课时作业（含答案，分析）新人教教版选修8.单词拼写1The new aircraft has performed very well in its _ (最初的)trials.2Three of the chickens _ (孵出) today. 3The _ (羽毛) of a pigeon can bring you good luck!4He gave me a _ (合理的) explanation.5I _ (只是) suggest you should do it again.6She put some _ (装饰) on the Christmas tree.7The great _ (缺点) to living near a main road is noise.8A little baby is _ (不能的) to walk or talk.9Its traditional in England to eat _ (火鸡) on Christmas Day.10We tried in _(徒劳的) to persuade him to go with us.单项填空1A bright idea suddenly _ me that I could use the money I saved to help a poor student in the countryside.AstruckBoccurredChappened Dhurt2Cant you keep still？Is it so funny?Sorry.I can hardly resist _.Alaughing Bto laughCcrying Dto cry3He is in good_for a man of his age.Acondition BatmosphereCcase Dsituation4Do you often go fishing at weekends?Not often，I only go fishing _.Aat one time Ball the timeCat a time Dfrom time to time5(xx宿州高二检测)He is a _person and will understand your delay.Aavailable BfortableCconvenient Dreasonable6The work we have done has brought great benefits.We are happy that our efforts are not _.Ain use Bin needCin vain Din order7(xx辽阳高二月考)You have no idea how she finished the relay race _ her foot wounded so much.Afor BwhenCwith Dwhile8Are you sure that Alice is honest?No.Thats _ a guess of ours.Acertainly BhardlyCmerely Dnearly9The decision has been made _ the new school building be built next month.Awhy BhowCwhether Dthat10(xx四川高考)I feel so nervous about the National English Speech petition tomorrow._.AI really envy you BGlad to hear thatCSounds great DTake it easy.阅读理解AA team of Michigan State University(MSU) researchers has developed a new，more efficient way of cloning zebra fish，a breakthrough that could have an impact on research into human health.Zebra fish are quickly being the animal of choice for many researchers.“After mice，they are the most monly used vertebrates，that is，animals with backbones，in genetic studies，”says Jose Cibelli，the leader of the team.“They are used in cancer and heartdisease research because they have many of the same genes as people have.”For more than 20 years，zebra fish have also served as an excellent model for understanding both normal development and birth imperfections.More recently，research with zebra fish has extended to modeling human diseases.Traditional cloning uses an egg and a donor(捐赠者) cell.The DNA is removed from the egg and replaced by the DNA taken from the donor.The resulting fish is an exact genetic copy of the donor.In Cibellis technique，the egg is removed from the female zebra fish and placed in the ovarian(卵巢的) fluid of a Chinook salmon，another kind of fish，before the donor cell is placed into the egg.The previous methods of cloning zebra fish had very low survival rates.With the new technique，the number of cloned fish is increased by 15 percent.What makes zebra fish so useful in research is that their eggs are transparent(透明的)，making the fishs development easy to follow.Improving zebrafish cloning techniques is also important because currently the mouse is the only good model for genetic research.“So far the mouse is the only animal from which you can delete genes in a reliable way，”Cibelli says.“What researchers do is mutate(使变异) a gene，destroy its function pletely，and then study the consequences.”1. What do we learn about zebra fish from the text?AThey can be used to cure human diseases.BThey have been used in genetic studies for 20 years.CThey are the only vertebrates used in cloning.DTheir survival rates are increased by the new method of cloning.2. Researchers choose zebra fish for genetic research because _.Athey have the same genes as human beingsBthey are a kind of vertebrateCtheir genes can be changedDtheir eggs are easy to observe3. We can infer the following from the text EXCEPT that _.Athe zebra fish cloning technology may provide a new model for genetic researchBmice will not be used in genetic research any moreCexperimental results on zebra fish may apply to human beingsDJose Cibelli led the new research of cloning zebra fish4Whats the text mainly about?AHow cloning has developed.BA study of a new way to clone zebra fish.CA breakthrough in research into human health.DZebra fish，the best model for genetic research.BWith all the lowfat and fatfree products on the market，youd think reducing fat intake would be the surest way to greater health.In fact，there is such a thing as too little fat.Strange but true：eating without fat can lead to vitamin deficiencies(维生素缺乏症)Thats because some vitamins require fat to be taken into the body and to do their jobs，which include providing energy，keeping the body working normally and supporting the body to fight against disease，for a start.Vitamins are necessary，which means fats are necessary，too.Dietary fat，which es from the food you eat，is crucial to the intake of the vitamins soluble(可溶的)in fat，which includes vitamins A，D，E and K(Vitamin C，needed for healthy teeth，doesnt need fat) Among them，vitamin A is necessary for good eyesight，and vitamin D for bone health.When vitamins which are soluble in fat are taken in，they move from the mouth to the stomach and then to the small intestine(小肠)Fats can move across the cell walls(细胞壁) of the small intestine and enter the bodys general movement of blood.Any vitamins in that fat are taken into the body as well.The vitamins are then carried to the liver(肝脏)，where theyre stored until the body needs them.Without enough fat in your diet，your body cannot successfully take in the fatsoluble vitamins that are necessary to your health.However，the types of fat you eat matter a lot.There are some important rules to follow，including：avoid unhealthy fats and plant fats are best.Besides，eat healthy oils.Last but not least，dont overdo it.You only need a small amount of fat to help take in vitamins.Just a little with any vitaminrich meal and itll get those vitamins into position to do some good.5The first paragraph mainly talks about _.Awhy lowfat products are popularBthe best way to stay healthyCthe importance of different vitaminsDthe important part that fat plays6Eating fatfree meals can result in the shortage of vitamins because _.Asome vitamins can be taken in with the help of fatBvitamins are sometimes hard to be taken inCeating without fat makes the body too weakDfatfree meals make people eat fewer vegetables7Which of the following might be the result of fatfree diets?ABad teeth. BOverweight.CHair loss. DSoft bones in legs.8How many tips are mentioned on taking in fat?ATwo. BThree.CFour. DFive.翻译句子1对不起，打扰一下，你能告诉我到火车站去的路吗？(bother)_2你学了那么多，一定能通过这次考试的。(bound)_3她身体超重，但是禁不住美食的诱惑。(resist)_4她年轻热情，把我迷住了。(strike)_5我们决不向任何困难屈服。(condition)_课时作业(四).1.initial2.hatched3.feather4.reasonable5.merely6.decorations7.drawback8.unable9turkey10.vain.1.A句意：我突然有了一个很好的想法我可以用存下来的钱帮助农村的一名贫困学生。strike在此意为“突然想到”，为及物动词。occur作“突然想到”解时，为不及物动词。2Aresist doing sth.为固定搭配，意为“抵制做某事，忍住不做某事”，再结合关键词funny可知A项符合题意。3A考查名词词义。in good condition意为“状况良好”。atmosphere“气氛”；case“情况”；situation“形势”。4D考查介词短语。at one time“曾经”；all the time“始终”；at a time“每次”；from time to time“有时”。由句意可知D项正确。5D考查形容词词义辨析。available “可用的”；fortable“舒服的”；convenient“方便的”；reasonable“合理的，讲道理的”。由句意可知D项正确。6C根据“The work we have done has brought great benefits.”可知我们所做的工作带来了很大的成效，所以我们的努力没有白费。“in vain”意为“徒劳，白费力气”，符合题意。7C考查with的复合结构用法。with名词形容词/分词，在句中作状语，表示谓语动作发生的伴随情况、时间、原因、方式等。8Cmerely意为“仅，只，不过”；certainly一定，必定，当然；hardly几乎不；nearly差不多，几乎。根据否定回答可知C项正确。9D“that the new school building be built next month”为同位语从句，解释说明名词decision的内容。10D对话上句句意：对于明天的全国英语演讲比赛我感到非常紧张。四个选项的意思分别是：A项“我真羡慕你”；B项“听到这件事很高兴”；C项“听起来不错”；D项“别紧张”。由题中的关键信息nervous可知D项符合题意。.1.D根据第五段最后的“.the number of cloned fish is increased by 15 percent.”可以知道，这种新的克隆技术可以大大提高克隆斑马鱼的成活率。2D根据第六段的“What makes zebra fish so useful in research is that their eggs are transparent，making the fishs development easy to follow.”可知人们之所以选择斑马鱼进行基因研究是因为他们的卵是透明的，利于观察。3B根据最后一段的“So far the mouse is the only animal from which you can delete genes in a reliable way，Cibelli says.”可以推知B项不正确。4B通读全文可以知道，作者是在介绍一种比较新的克隆斑马鱼的研究，因此B项符合题意。5D本段主要介绍了脂肪的重要作用。6A根据第一段的“Strange but true：eating without fat can lead to vitamin deficiencies.Thats because some vitamins require fat to be taken into the body.”可知，有些只溶于脂肪类的维生素只有在脂肪存在时才能被人体吸收，所以脂肪摄入不足会导致维生素缺乏症。7D根据第二段的“.the vitamins soluble in fat，which includes vitamins A，D，E and K.and vitamin D for bone health.”可知，维生素A，D，E和K都是脂溶类维生素，无脂类食物可能导致这些维生素缺乏，而维生素D会对人的骨骼起重要作用。8B根据最后一段“There are some important rules to follow，including：avoid unhealthy fats and plant fats are best.Besides，eat healthy oils.Last but not least，dont overdo it.”可知，在摄取脂肪的问题上，文中共给出三种建议，即“避免摄入不健康的脂肪”、“食用健康的油类”以及“不要过量摄入脂肪”。.1.Im sorry to bother you，but can you tell me the way to the railway station？2.Youve done so much work that youre bound to pass the exam.3.She is overweight，but she cant resist eating more delicious food.4.I was struck by her youth and enthusiasm.5.On no condition shall we give in to any difficulty.