Unit 5Rhythm 每课一练（北师大版必修2）

Unit 5 Rhythm 每课一练（北师大版必修2）.完形填空Generally，a computer is any device that can perform numerical calculations._1_，however，the term usually refers to an electronic device that can _2_a series of tasks according to a _3_set of instructions.In 1953 there were only about 100 computers in use in the _4_world.Today hundreds of millions of computers are being used in homes，schools，businesses，government offices，and universities for almost every _5_purpose.Modern desktop personal computers，or PCs，are many times more _6_than the huge，milliondollar business computers of the 1960s and 1970s.Most PCs can perform from 400 million to several billion _7_per second.These computers are used not only for household _8_and personal entertainment，but also for most of the automated tasks _9_by small businesses.The fastest desktop computers are called workstations，and they are _10_used for scientific，engineering，or advanced business _11_.The speed and power of supercomputers，the fastest class of computer，are almost beyond human comprehension，and their _12_are continually being _13_.The fastest of these machines can perform more than 7 trillion and theoretically can run more than 12 trillionoperations per second and can store 6 trillion characters in its memory，allowing it to do the work of thousands of PCs.Supercomputers _14_these speeds through the use of several advanced engineering techniques.Because they can cost billions of dollars and because they can be large enough to cover the size of two basketball courtssupercomputers are used _15_by government agencies and large research centers.1A.CurrentlyBConsequentlyCCertainly DClearly解析：选A。Currently目前。该句的意思是：一般来说，任何可以执行数字计算的装置都可以称为计算机。但是，现在，这个词一般是指能够按照一系列精确的指令执行一系列任务的电子装置。B.Consequently“后来”；C.Certainly“当然”；D.Clearly“很明显地”。从逻辑关系上来看，只有Currently最合适。2A.perform BconductCachieve Dfulfill解析：选A。perform“做；执行；表演；指挥；操作”；B.conduct“行为；处理；引导；指挥；导电”；C.achieve“完成，达到”；D.fulfill“实践，履行，实行，结束，满足，完成，达到”，只有A符合文意。3A.rigid BseriousCprecise Dharsh解析：选C。precise精确的，准确的，符合文意。A.rigid“刚硬的，刚性的，严格的”；B.serious“严肃的；认真的”；D.harsh“严厉的；残酷的；无情的”。4A.entire BcompleteCtotal Dgeneral解析：选A。该句的意思是：在1953年，全世界只有大约100台计算机。“全世界”用entire world。B.complete强调“完整性”；C.total强调“合计，总计”；D.general“一般的，普通的，综合的，概括的，全面的，大体的”。5A.perceptive BpossibleCinevitable Dimaginary解析：选B。possible“可能的，想得到的，可想象的”，符合题意。A.perceptive“感觉敏锐的；观察入微的”；C.inevitable“不可避免的，必然的”；D.imaginary“假想的，想象的，虚构的”，均与题意不符。6A.powerful BlargerCclever Dsmaller解析：选A。many times more powerful，该句的意思是：现代的台式个人计算机，或者PC，比二十世纪六十年代和七十年代那些巨型的，价值数百万的商用计算机功能强大很多倍。7A.exercises BmissionsCerrands Doperations解析：选D。该句的意思是：大多数个人电脑每秒可以实现四亿到几十亿次的运转。和perform搭配的名词，四个选项中，operation最恰当。A.exercise“练习，习题”；B.mission“特使团；任务”；C.errand“差事，差使，使命”，不合题意。8A.management BexecutionCapplication Dmanipulation解析：选A。该句的意思是：这些电脑不仅用于家庭管理和个人娱乐，而且用于企业多数的自动完成的任务。management“经营，管理，处理，操纵”，符合题意。B.execution“实行，完成，执行，死刑”；C.application“请求，申请，申请表，应用，运用”；D.manipulation“处理，操作，操纵，被操纵”。9A.claimed BnecessitatedCrequired Drequested解析：选C。required“需要”，根据句意用require最恰当。A.claim“(根据权利)要求，认领，声称，主张”；B.necessitated“使需要；使成为必需；”D.request“要求；请求”。10A.inclusively BgenerallyCtotally Dentirely解析：选B。该句的意思是：最快的计算机被称为工作站。它们一般被用于科学，工程，或者高级商务。B.generally“一般地，通常地”符合题意。A.inclusively“包含地，在内地”；C.totally“完全地”；D.entirely“彻底地；完全地”。11A.employments BexercisesCusages Dapplications解析：选D。applications“应用”，usage一般指语言的“使用，用法”。12A.capabilities BqualificationsCskills Dvacancies解析：选A。该句的意思：它们的性能还在日新月异地改进。capability“(实际)能力，性能，容量，接受力”，符合题意。B.qualification“资格，条件，限制，限定，赋予资格”；C.skill“技能，技巧，熟练，巧妙(多用于人)”；D.vacancy“空，空白，空缺，空闲”。13A.propelled BboostedCimproved Denriched解析：选C。improved“提高”，“改进”，“改善”，符合题意。A.propel“推进，驱使”；B.boost“往上推；增加；提高”；D.enrich“使富足，使肥沃，使丰富”。14A.obtain BachieveCwin Dsecure解析：选B。该句的意思是：超级计算机是通过使用几种先进的工程技术实现这么快的速度的。“实现某种速度”，可以用achieve。15A.primarily BconditionallyCinitially Dfundamentally解析：选A。该句的意思是：因为它们可能价值数亿美元，同时也因为它们体积巨大，可以覆盖两个篮球场，超级计算机主要是政府机关和大型研究中心使用的。根据题意，选A。其他选项B.conditionally“有条件地”；C.initially“最初，开头”；D.fundamentally“基础地，根本地”。.语法填空The Shenzhou astronauts Liu Boming，Zhai Zhigang and Jing Haipeng all returned safe and sound at 537 pm.yesterday afternoon with a solid touchdown in the Inner Mongolia autonomous region.The process was broadcast live 1._ national television.Spaceship commander and spacewalker Zhai Zhigang told China Central Television shortly after he and his crew 2._ (help)out of the reentry capsule: “It was a glorious mission (使命)，full of challenges with a perfect ending.I feel 3._ (pride)of our motherland.”The three heroic astronauts will have to wait 4._this morning before they can return to their homes.Before then，they were arranged for a full nights rest in Hohhot，the capital of Inner Mongolia.Zhai，a 42yearold astronaut from Heilongjiang Province，got his place in the history books with 5._20minute spacewalk on Saturday.“Greetings to the Chinese people and the people of the world，” Zhai said as he floated out of Shenzhou 6._(slow)Liu stayed inside the orbital module to assist him 7._Jing monitored the operation from the reentry capsule.President Hu Jintao watched the spacewalk from the Beijing center8._a number of other state leaders.Shortly afterwards，Hu told the astronauts in a televised telephone exchange: “Your 9._(succeed)represents a breakthrough in our manned space program，the motherland and the people are 10._(thank)to you.”1解析：考查介词的用法。根据意思：“全过程电视现场直播”on/over television通过电视。答案：on/over2解析：考查谓语动词的用法。根据句子结构：连词after后缺少谓语，由句意知，此处用被动语态，意为“他和他的伙伴被帮助”。答案：were helped3解析：考查形容词的用法。感官动词feel需加形容词作表语。答案：proud4解析：考查介词的用法。 根据结构：_this morning 作状语，应填介词，根据意思“一直等到今天上午”。答案：until/till5解析：考查冠词的用法。中心名词spacewalk前需加冠词或形容词性物主代词来修饰。答案：his/a/the6解析：考查副词的用法。副词slowly用以修饰动词float。答案：slowly7解析：考查连词的用法。根据结构：空格前后都有谓语动词，应填连词；再根据意思“当时候”引导时间状语从句。答案：while/as8解析：考查介词的用法。根据意思：“与其他国家领导人一起观看了。”with表示伴随状况。答案：with9解析：考查名词的用法。 根据结构：空格前是形容词，应填名词。“你们的成功”应用名词success。答案：success10解析：考查形容词的用法。系动词are后要用形容词。答案：thankful.阅读理解Researchers are placing robotic dogs(机器狗)in the homes of lonely old people to determine whether they can improve the quality of life for humans.Alan Beck，an expert in humananimal relationship，and Nancy Edwards，a professor of nursing，are leading the animalassisted study concerning the influence of robotic dogs on old peoples depression，physical activity，and life satisfaction.“No one will argue that an older person is better off being more active，challenged，or stimulated(刺激)，”Edwards points out.“The problem is how we promote(使成为现实)that，especially for those without friends or help.A robotic dog could be a solution.”In the study，the robot，called AIBO，is placed for six weeks in the houses of some old people who live alone.Before placing AIBO in the home，researchers will collect baseline data for six weeks.These old people will keep a diary to note their feelings and activities before and after AIBO.Then，the researchers will review the data to determine if it has inspired any changes in the life of its owner.“I talk to him all the time，and he responds to my voice，”says a seventyyearold lady.“When Im watching TV，hell stay in my arms until he wants down.He has a mind of his own.”The AIBOs respond to certain orders.The researchers say they have some advantages over live dogs，especially for old people.Often the elderly are disabled and cannot care for an animal by walking it or playing with it.A robotic dog removes exercises and feeding concerns.“At the beginning，it was believed that no one would relate to the robotic dog，because it was metal and not furry.”Beck says.“But its amazing how quickly we have given up that belief.”Hopefully，down the road，these robotic pets could become a more valuable health helper.They will record their masters blood pressure，oxygen levels，or heart rhythms.AIBOs may even one day have games that can help stimulate old peoples minds.1The purpose of Beck and Edwards study is to_.Aunderstand humananimal relationshipBmake lonely old peoples life betterCfind the causes of old peoples lonelinessDpromote the animalassisted research解析：选B。依据第一段开头“.to determine whether they can improve the quality of life for humans.”可以得出答案。2In the research，the old people are asked to_.Anote the activities of AIBOsBkeep AIBOs at home for 12 weeksCrecord their feelings and activitiesDanalyze the collected information解析：选C。依据第二段“These old people will keep a diary to.”可知。3What is the advantage of AIBO over live dogs?AIt is easier to keep at home.BIt can help the disabled people.CIt responds to all the human orders.DIt can watch TV with its owner.解析：选A。从文章第四段“.some advantages.removes exercises and feeding concerns.”可以知道答案。4The author seems to suggest that the future robotic dogs may_.Acure certain diseasesBkeep old people activeCchange peoples beliefsDlook more like real dogs解析：选B。从文章的最后一句“.stimulate old peoples minds.”可得出答案。5According to the passage，which of the following statements is TRUE?AThe professors are leading the animalassisted study concerning old peoples life.BThe AIBOs will always listen to their owners without their own minds.CThe researchers will know from the data whether AIBO can help its owner.DAIBOs can have games with the old people to stimulate their minds.解析：选C。从文章第一段可以知道这个研究是关注机器狗对老人们生活的影响，而不是关注老人们的生活，所以A是错的；从文章第三段“He has a mind of his own.”得知B项也不对；文章最后一句“AIBOs may even one day.”说明D项提到的现在还没有实现；从文章第二段最后一句可以知道C项是正确的。.信息匹配阅读下面6款数码产品的介绍，并按照要求匹配信息。以下是不同款式数码产品的介绍：ACool Design MP4 Player1GB1.8Inch ScreenVery coollooking MP4 Player，Combining 65,000 OLED screen，easy to use design，a playback function in MP3 or WMA，digital picture slideshow function，and USB 2 with Plug and Play，this wholesale MP4 is easily worth more than its low price.Easy to understand menus，and responsive buttons.Sample Price：$28.00B16GB MP4/MP3 Player with 2.7Inch LCDPocketsized PMP16GB Portable Media Player (PMP)with crisp (清新的)TFT LCD touchscreen.Many functions and features.Starting with an easy to use interface for accessing music，videos，pictures，ebooks，and portable data storage.If you want an MP4 player perfect for videos，then the crisp 2.7inch TFT screen is a beauty.Sample Price：$81.25CMusic Lovers MP4 Player,4GB，RedThe Red version of the popular Music Lovers MP4 Player.For all you PMP fans who crave having excellent quality sound from your music，and demand being able to adjust music for the best possible results，then this new super HQ red 4GB China version Music Lovers Edition MP4 Player is the portable media that you should be looking at.Sample Price：$ 40.75DWatch MP4 Player,2GB,1.5Inch OLED Screen The Original MP4 Player Watch as featured on tech news all over the Internetthe cool gadget(小配件)everyones been waiting for.This is a digital watch with a 1.5inch full color video screen and 2GB of flash memory.You can watch videos on your watch and listen to MP3 music.Browse your digital picture and digitally record sound!Sample 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