2020年高考英语一轮复习课时作业8 Unit 3 Computers 新人教版必修2（江西专用）

课时作业(八)必修2Unit 3 Computers限时：30分钟.单项填空12020四川卷 Im sorry I didnt finish it on time._AFine, thanks. BNo, thanks.CThanks a lot. DThanks anyway.2Maybe he really should do more exercises from now on. _， I hope he could get over soon.ASomehow BSomewhatCAnyway DAnywhere3Will you_ my clothes while I have a swim？No problem.Awatch over Blook overCgo over Dthink over4Toms boss gave him a long leave after the terrible accident._， he was fired.AAs a result BIn other wordsCOn the contrary DTo be honest5Italian Luca Parmitano, one of the European Space Agencys new astronauts, _ to go into orbit and live on the International Space Station in 2020.Ahas been selected Bhas selectedCwill select Dwill be selected6The ballet Nutcracker will be put on next week. Why not join us to the theater？Well, not me. _.AThat is simply not my cup of teaBI cant wait to goCI just dont believe a single word of itDThat is not a point7_ the day went on, the weather got worse.AWith BSinceCWhile DAs8Hey！ Here is a message on my cell phone, telling me to send money toDelete it！ Its a trick. Many a person _ by such tricks.Ahas been cheated Bhave been cheatedCwere cheated Dwas cheated9My friend Martin was very sick with a strange fever； _， he could neither eat nor sleep.Amoreover BhoweverCas a result Dfurthermore10The Great Wall is _ tourist attraction that millions of people pour in every year.Aso a wellknown Ba so wellknownCsuch wellknown Dsuch a wellknown11The dinner was delicious！I agree. I am so full.Thats too bad. But some dessert_.Ahas ordered Bwill be orderedChas been ordered Dwas going to be ordered12It is a truth _ acknowledged that when one has gained material wealth, hell surely seek for spiritual enjoyment.Apartly BuniversallyCparticularly Dpreviously13Im afraid that I cant finish the task as soon as planned._.ADont be afraid BDont mention itCI suppose so DTake your time14You look so worried. Whats the matter？I dont know_ these boring problems.Awhat to deal with Bhow to do withCwhat can I do with Dhow to deal with15Thats the third time hes won the award in this field.Yes. He _ his maximum potential in the past decade.Aexplored Bis exploringChas been exploring Dhas explored.阅读理解AMIT researchers and their colleagues are working to find out whether energy from trees can power a network of sensors (传感器) to prevent spreading forest fires.What they learn could also raise the possibility of using trees as silent guards along the nations borders to discover potential threats such as smuggled (走私的) radioactive materials.The US. Forest Service currently predicts and tracks fires with a variety of tools, including remote automatic weather stations. But these stations are expensive and sparsely (稀疏地) distributed. Additional sensors could save trees by providing better local climate data to be used in fire prediction models and earlier warnings. However, recharging or replacing batteries by hand at very hardtoreach locations makes it impractical and costly.The new sensor system seeks to avoid this problem by developing trees into a selfsustaining power supply. Each sensor is equipped with a battery that can be slowly recharged using electricity produced by the tree. “A single tree doesnt generate a lot of power, but over time the trickle (细流) charge adds up, just like _” said Shuguang Zhang, one of the researchers on the project and the associate director of the MITs Center for Biomedical Engineering (CBE).The system produces enough electricity to allow the temperature and humidity sensors to wirelessly send out signals four times a day, or immediately if theres a fire. Each signal spreads from one sensor to another, until it reaches an existing weather station that sends the data by satellite to a forestry command center in Boise, Idaho.Scientists have long known that trees can produce extremely small amounts of electricity. But no one knew exactly how the energy was produced or how to take advantage of the power.16What are the disadvantages of the remote automatic weather stations？a. They cost too much.b. They are of poor quality.c. They are not enough.d. They cant reach remote places.Aa, b Bb, d Ca, c Db, c17Which of the following is the best sentence to fill in the blank？AFar water does not put out near fire.BAll rivers run into sea.CMany a little makes a mickle.DIt never rains but it pours.18What Shuguang Zhang said in Paragraph 4 means that _.Aa single tree is enough to generate much powerBthe power from the tree cant be storedCtrees can generate enough power for our lifeDa tree can produce the electricity to meet the needs of a sensor19What would the author talk about after the last paragraph of the passage？AThe amount of electricity trees produce.BHow trees produce electricity.CTrees contribution to society.DThe research process of tree power.20What would be the best title for the passage？APreventing forest fires with tree powerBTrees can produce electricityCTree power in daily lifeDDeveloping new energyBHow you end a computer session depends on how you use the computer, your views on energy conservation (能源的节约), and what you have been told about how your decision will affect your investments longevity： will frequent starting and stopping cause its circuits(电路) to burn out sooner？Rest easy, your computer is more likely to be damaged by a virus picked up from the Internet than by being turned off and on too much. They are also energyefficient： such efficiency has reached the point where most computers place themselves in sleep mode if they remain idle (闲置的) for a certain period of time. So your computer will likely slip into sleep mode anyway, even if you leave it on overnight.Sleep mode itself, once a pretty unreliable optionyou never knew if you would be able to wake your computer without having to reboot (重新启动) ithas been vastly improved with newer operating systems. If you want your computer to consume as little energy as possible when not in use, shut it down. If you want it to consume zero energy, youre going to have to unplug (拔去的电源插头) it.Your computer can be in only three states： on, sleep or offeach of which draws some level of electric current.A computer that is “on” will either be actively processing information or sitting idle, depending on whether the user is typing a document, reading an email or has stepped away briefly. The amount of wattage (瓦特数) drawn when the computer is on varies greatly depending on whether it is a laptop or a desktop computer. The latter uses more energy because desktop power supplies are less efficient and require a separate and often larger, powerhungry monitor. It also varies based on the type of work being done： complex calculations requiring intensive processing are more powerhungry, whereas writing or Web browsing consumes far less electricity.21If sleep mode goes wrong, what will probably happen to your computer？AIt will consume as little energy as possible.BIt is more likely to be damaged by a virus picked up from the Internet.CIt will have to be rebooted when used again.DIt has to be shut down and unplugged.22Which of the following is NOT mentioned in the text that contributes to the different amount of energy a computer consumes？AWhether it is a laptop or a desktop computer.BWhat kind of work the computer is dealing with.CThe choice of how you use your computer.DWhether the operating systems are new.23When does a computer consume the most energy？AWhen we let it remain idle.BWhen we use it to do complex calculations.CWhen we use it to type some documents and email.DWhen we use it for surfing the Internet.24The reason why a desktop computer uses more energy than a laptop computer is that_.Aa desktop computers monitor is separate and often largerBa desktop computer is larger than a laptop computer in sizeCa desktop computer performs more kinds of work than a laptop computerDa desktop computer is not energyefficient25Which of the following is implied in the first two paragraphs？AFrequent starting and stopping can damage a computer.BA computers longevity depends more on the proper way you use it.CA virus picked up from the Internet is likely to damage a computer.DThe more often you use a computer, the more smoothly it works.课时作业(八).1.D考查交际用语。句意为：“很抱歉，我未能按时完成它。”“无论如何我还得谢谢你。”D项符合语境。A项为见面打招呼用语；B项在表示委婉拒绝时用；C项在表示非常感谢时用，均不符合句意。2C考查副词辨析。句意：也许，从现在起他真应该多锻炼。不管怎样，我希望他能很快恢复过来。somehow “由于某种原因”；somewhat “有点；稍微”；anyway “不管怎样；无论如何”；anywhere “在任何地方”。故C符合题意。3Awatch over “照管”。句意为：我去游泳，你帮我看一下衣服好吗？其他选项均不符合句意。4B考查短语辨析。出了重大事故放长假，也就是说(换句话说)，他被开除了。前后句子从逻辑上讲不存在因果关系或者转折关系。5A考查动词的时态和语态。Italian Luca Parmitano 和select 是被动关系，故排除B，C。根据句意，表示过去的动作“已经被选入”对现在的影响，故用的是现在完成时的被动语态，故选A。6A考查交际用语。由答语中的not me可以看出，他不想去，所以选择A项，这是一句美式俚语，意为“我不喜欢这个东西”或者“它不适合我”。7D考查词汇辨析。as作“随着”解为连词，引导时间状语从句。with 是介词，不能引导从句。8A考查时态、语态和主谓一致。答话人之所以让对方删除手机上要求汇款的信息是因为到目前为止已经有很多人上当受骗，所以用现在完成时的被动语态，排除C、D两项； many a表示“大量”，修饰单数可数名词，谓语动词用单数，故排除B项选A项。9C考查as a result的用法。as a result意为“因此，所以”，单独使用，表示后句是前句的结果；而however表示转折，moreover, furthermore表示递进，不符合语境。10D考查such aadj.nthat结构。注意，如果把A项中的a 放到wellknown后也是正确的。11C主要考查在交际用语中动词的时态及语态。根据主语与谓语动词的关系可知是被订购，于是排除选项A；选项B表示将要发生的事情；选项C表示已经发生的事情；选项D表示过去某个时候即将发生的事情。根据前面的Thats too bad.可知，事情已经发生，故答案为C。12B考查副词辨析。句意为：当一个人得到了物质财富后，他一定会寻求精神享受，这是一个被大家所普遍接受的真理。partly “不完全地，部分地”；universally “普遍地”；particularly “尤其，特别”；previously “先前，预先”。语意表示这是被大家所普遍接受的真理，因此选B。13D考查交际用语。句意为：“恐怕我不能像计划得那么快完成任务。” “别急，慢慢来。”Im afraid为委婉的说法，不用Dont be afraid来回答；Dont mention it用来回答道歉；I suppose so表示“我想如此”，相当于I think so，不符合语境。Take