20.Though"nanometer"(納米) is now a fashionable term all over the world,few people know exactly what it is.It has become a new favorite of manufacturers and sellers in recent years.Many"high-tech"products bearing the name"nano"have entered the market,bringing more mysterious feeling to surprised consumers.
Nanometer is a very small length unit of measure,and is very small.One millimeter is 1000micrometers,and one micrometer is 1000nanometers.That is,one nanometer is one billionth of a meter.Nano materials are solid materials composed of particles(粒子) or crystallites(晶體) of less than 100nanometer in size.Then,is a cup made of nano material really any different from an ordinary cup in function as far as how it works?
Are nano cups really so wonderful?A reporter went to the Institute of Nanomedicine,which is the first such institute of such a sort in the world and the only one in China,specializing in researching the investigation of the application of nano technology into medicine.
A water molecule(分子) is composed of 2hydrogen atoms and 1oxygen atom.It can be changed only by special working skillfully of the atoms.The material making up the cup can have nanometer particles.But it cannot change the chemical and physical propertiesof the water contained in it.The water in the cup is still water.When people drink it,it will produce no special effect on human body.
Professor Ji who worked in the Instiute of Nanomedicine told the reporter,so far,the investigation of nano materials is still limited in the laboratory.No commercial micro products can be produced yet.With the present level of science and technology,the time of everyday goods made of nanometer materials is still years away.
The products labeled with nano marks in the market now are only traditional products coated with a thin layer of nanometer material,which makes them more abrasion resistant(耐磨),much easier to be cleaned,or oil resisting or moth proof(防蛀).
Professor Ji explained that nano cup is a real cup.It can also be included in the list of nano products in a certain sense.But the nano cup has not changed its property and function as a cup.It is not a magical medicine for curing and health care.

67.Which of the following shows the right relationship?A
A.nanometer<micrometer<millimeter<meter
B.micrometer<millimeter<nanometer<meter
C.nanometer<millimeter<micrometer<meter
D.millimeter<micrometer<nanometer<meter
68.It can be inferred from the passage thatD.
A.real nano products are being produced by some companies
B.nano materials have been put into use in daily goods
C.the nano cup is very effective in curing and health care
D.real nano products haven't become available for people
69.The underlined word"properties"in the fourth paragraph probably meansC.
A.possessions   B.reactions   C.qualities  D.symbols
70.What would be the best title for the passage?B
A.High-tech Products        B.Nano Materials
C.High-teach Research       D.Nano Cups.

分析 本文是一篇科教類閱讀,主要介紹了什么是納米材料及其目前的研究進展.

解答 67-70 ADCB
67題答案:A考查細節(jié)推理,根據(jù)原文第二段One millimeter is 1000micrometers,and one micrometer is 1000nanometers.可知本題答案為A選項.
68題答案:D考查細節(jié)推理,根據(jù)原文第四段的With the present level of science and technology,the time of everyday goods made of nanometer materials is still years away.由于目前科學技術(shù)的局限,用納米材料制造日常用品的時代還很遠.可知本題答案為D選項.
69題答案:C考查細節(jié)推理,根據(jù)后面的The water in the cup is still water.可知"納米材料杯并未改變水的特征",故本題答案為C選項.
70題答案:B考查主旨大意,本文主要講的是什么是納米材料及其目前的研究進展;故本題答案為B選項.

點評 本文是一篇科教類閱讀,題目涉及多道細節(jié)理解題,做題時結(jié)合原文和題目有針對 性找出相關(guān)語句進行仔細分析,結(jié)合選項選出正確答案.推理判斷也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確的答案.

練習冊系列答案
相關(guān)習題

科目:高中英語 來源: 題型:閱讀理解

10.There is a story about a man who lost his legs and left arm in an accident.After the accident,only a finger and thumb on his right hand remained.
He was a brilliant,creative,and educated man.He had gained a lot of experience while traveling around the world,so he became very depressed after his accident.He was afraid that he would spend the rest of his life suffering and would no longer be able to spend his life in a meaningful way.Then,he realized that he still had partial function of his right hand and could still write even though it was very difficult.An idea occurred to him."Why not write to other people who need encouragement?"
He wrote to the prison ministry about sending letters to the prisoners.The prison minister replied,"Writing to the prisoners is acceptable,but your letters will not be answered."
Filled with excitement,the man knew he could write his letters.He began sending one-way messages of God's love,hope,strength,and encouragement.He wrote twice a week,testing his strength and ability to the limit.He poured his heart and soul into his words and shared his experience,sense of humor,optimism,and faith.
It was difficult to write those letters,especially without hope of a reply.One day he received a letter from the prison ministry.It was a short note from the officer who monitored and checked the prison mail.
  The letter said,"Please write on the best paper you can afford.Your letters are passed from cell to cell until they literally fall to pieces!"
No matter what circumstances life may present,we all have unique experiences,abilities,and God-given talents.We can discover ways to reach others who desperately need messages of encouragement and strength.
28.In order to live in a meaningful way,the man began toB.
A.receive the school education
B.write to other people who need encouragement
C.meet the people who are depressed
D.help other people with lost arms and legs
29.According to the prison minister,C.
A.the man was not allowed to write to the prisoners
B.the man couldn't go to see the prisoners himself
C.the prisoners were not allowed to answer the letters
D.he was not sure if the prisoners would receive the letters
30.From the officer's short note we are told thatD.
A.the man would be offered free paper to write letters on
B.some of the prisoners were not satisfied with his letters
C.the prisoners eagerly wanted to write back to the man
D.his letters were very popular among the prisoners
31.What can be the best title for the passage?C
A.Stories about a Humorous Person
B.Popularity of Special Letters
C.Special Letters of Encouragement
D.Relationship between writers and prisoners.

查看答案和解析>>

科目:高中英語 來源: 題型:完形填空

11.A civilized society has the virtues of beauty,culture,comfort and peace.However,the motor-car is (1)C these virtues.
A visitor from outer space viewing our cities would conclude that the human race is made up of shiny metallic"beetles"creeping along vast networks.He is not far(2)D.The motor-car,far from being(3)B a vehicle for man,is determining the design of whole cities.The single largest consumer of valuable city(4)Ais its roads and car parks.If there were fewer roads,we could have more natural parks in which to(5)B,more cultural centres and more public squares.Cars rob our cities of these civilized(6)A.
Not only do cars occupy space,they also create(7)C.Psychologists have confirmed that noise causes stress,and cities are indeed very noisy places.Cars are also the single largest(8)B
of air pollution.How can we say we are(9)D when we live in an atmosphere full of stress and health dangers?
Our economy depends on (10)A.These days it is becoming rare and(11)C,yet cars continue consuming large amounts of petrol.Energy,which could be used to run factories and houses,is being(12)B on roads.
Finally,cars have created a new type of monster,the motorist.Necessity has made man forget his gentle(13)D  and has transformed him into a selfish,dangerous monster,frightening innocent pedestrians,killing dogs,swearing at other motorists.The car is an outlet for his aggression.
To sum up,the motor-car has been(14)D  for destroying our cities,damaging our health,increasing economic problems and(15)C  humankind of their gentle nature.

1.A.representingB.promotingC.destroyingD.replacing
2.A.removedB.betterC.differentD.wrong
3.A.generallyB.merelyC.finallyD.hardly
4.A.spaceB.timeC.materialD.light
5.A.shareB.relaxC.hideD.work
6.A.pleasuresB.mannersC.individualsD.histories
7.A.conflictsB.chancesC.noiseD.growth
8.A.problemB.sourceC.effectD.provider
9.A.politeB.a(chǎn)wakeC.innocentD.civilized
10.A.energyB.wealthC.transportationD.industry
11.A.wastefulB.a(chǎn)vailableC.expensiveD.cheap
12.A.leftB.burntC.a(chǎn)rrangedD.produced
13.A.a(chǎn)ctionB.a(chǎn)ppearanceC.ideaD.nature
14.A.suitableB.possibleC.punishedD.responsible
15.A.warningB.remindingC.robbingD.convincing

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

8.According to sociologists,there are several different ways in which a person may become recognized as the leader of a social group.In the family,traditional cultural patterns award leadership to one or both of the parents.In other cases,such as friendship groups,one or more persons may gradually emerge as leaders,although there is no formal process of selection.In larger groups,leaders are usually chosen formally through election or recruitment(招聘).
Although leaders are often thought to be people with unusual personal ability,decades of research have failed to produce dependable evidence that there is any category of"natural leaders".It seems that there is no set of personal qualities that all leaders have in common; rather,practically any person may be recognized as a leader if the person has qualities that meet the needs of that particular group.
Research suggests that there are typically two different leadership roles that are held by different individuals.Instrumental leadership is leadership that emphasizes the completion of tasks by a social group.Group members look to instrumental leaders to"get things done".Expressive leadership,on the other hand,is leadership that emphasizes the collective well-beings of a social group's members.Expressive leaders are less concerned with the overall goals of the group than with providing emotional support to group members and attempting to decrease tension and conflict among them.
Instrumental leaders are likely to have a rather secondary relationship to other group members.They give others and may discipline group members who restrict attainment(達到) of the group's goals.Expressive leaders cultivate a more personal or primary relationship to others in the group.They offer sympathy when someone experiences difficulties and try to resolve issues that threaten to divide the group.As the difference in these two roles suggest,expressive leaders generally receive more personal affection from group members; instrumental leaders,if they are successful in promoting group goals,may enjoy a more distant respect.

72.What does the passage mainly discuss?D
A.The problems faced by leaders.
B.How leadership differs in small and large groups.
C.How social groups determine who will lead them.
D.The role of leaders in social groups.
73.Which of the following statements about leadership can be inferred from paragraph 2?A
A.A person who is an effective leader of a group may not be an effective one in another group.
B.Few people succeed in sharing a leadership role with another person.
C.A person can best learn how to be an effective leader by studying research on leadership.
D.Most people desire to be leaders but can produce little evidence of their qualifications.
74.In mentioning"natural leaders"in the second paragraph,the author is making the point thatB.
A.few people qualify as"natural leaders"
B.there is no proof that"natural leaders"exist
C."natural leaders"are easily accepted by the members of a group
D."natural leaders"share a similar set of characteristics
75.The passage indicates that instrumental leaders generally focus onD.
A.ensuring harmonious relationships   B.sharing responsibility with group members
C.identifying new leaders             D.a(chǎn)chieving a goal.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

15.I am a German by birth and descent.My name is Schmidt.But by education I am quite as much an Englishman as a'Deutscher',and by affection much more the former.My life has been spent pretty equally between the two countries,and I flatter myself I speak both languages without any foreign accent.
I count England my headquarters now:it is"home"to me.But a few years ago I was resident in Germany,only going over to London now and then on business.I will not mention the town where I lived.It is unnecessary to do so,and in the peculiar experience I am about to relate I think real names of people and places are just as well,or better avoided.
I was connected with a large and important firm of engineers.I had been bred up to the profession,and was credited with a certain amount of"talent"; and I was considered-and,with all modesty,I think I deserved the opinion-steady and reliable,so that I had already attained a fair position in the house,and was looked upon as a"rising man".But I was still young,and not quite so wise as I thought myself.I came close once to making a great mess of a certain affair.It is this story which I am going to tell.
Our house went in largely for patents-rather too largely,some thought.But the head partner's son was a bit of a genius in his way,and his father was growing old,and let Herr Wilhelm-Moritz we will call the family name-do pretty much as he chose.And on the whole Herr Wilhelm did well.He was cautious,and he had the benefit of the still greater caution and larger experience of Herr Gerhardt,the second partner in the firm.
Patents and the laws which regulate them are strange things to have to do with.No one who has not had personal experience of the complications that arise could believe how far these spread and how involved they become.Great acuteness as well as caution is called for if you would guide your patent bark safely to port-and perhaps more than anything,a power of holding your tongue.I was no chatterbox,nor,when on a mission of importance,did I go about looking as if I were bursting with secrets,which is,in my opinion,almost as dangerous as revealing them.No one,to meet me on the journeys which it often fell to my lot to undertake,would have guessed that I had anything on my mind but an easy-going young fellow's natural interest in his surroundings,though many a time I have stayed awake through a whole night of railway travel if at all doubtful about my fellow-passengers,or not dared to go to sleep in a hotel without a ready-loaded gun by my pillow.For now and then-though not through me-our secrets did ooze out.And if,as has happened,they were secrets connected with Government orders or contracts,there was,or but for the exertion of the greatest energy and tact on the part of my superiors,there would have been,to put it plainly,the devil to pay.

67.The writer preferred to be calledB
A.a(chǎn) German
B.a(chǎn)n Englishman
C.both a German and an Englishman   
D.neither a German nor an Englishman
68.Which of the following words cannot be used to describe the writer?D
A.Talented    B.Modest   C.Reliable    D.Wise
69.The head of the company where the writer works isC.
A.Schmidt   B.Moritz   C.Wilhelm's father   D.Gerhardt
70.The writer often stayed awake on the train or kept a ready-loaded gun in the hotel,becauseA
A.some people sometimes let out the secrets of his company
B.the writer occasionally didn't keep the secrets of his company
C.patents and the laws are strange things to have to do with
D.the secrets were connected with Government orders or contracts.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

5.If you are a high school senior graduating and looking to enter college in 2006,you will take the new exam.
The biggest change to the SAT (美國學術(shù)能力傾向測驗) will be the introduction of a new writing section.The writing section will consist of two parts:an essay and a multiple-choice section.Students will be given 25minutes to respond to a prompt (提示) and construct a well-organized essay that effectively deals with the task.The essay question may require students to complete a statement,to react to a quote,or to agree or disagree with a point of view.In any case,a good essay will support the chosen position with specific reasons and examples from literature,history,art,science,current affairs,or even a student's own experiences.
Essays will be scored based on the procedures for the current SAT II:Writing Test.Essays will be graded by two independent readers on a scale of 1~6,and their two scores will be combined to form an essay subscore that ranges from 2to 12.Should the readers'scores vary by more than 2points,a third reader will score the essay.The readers will be high school teachers and college professors who teach composition.To ensure that essays will be scored in a timely manner,they will be scanned and made available to readers on the Internet for grading purpose.
The writing section will also include multiple-choice grammar and usage questions.Some of these questions will call upon students to improve given sentences and paragraphs.Others will present students with sentences and require them to identify mistakes in diction (措辭),grammar,sentence construction,subject-verb agreement,proper word usage.
The highest possible score on the new writing section will be 800.Scores on the essay and multiple-choice section will be combined to produce a single score.A writing subscore will also be assigned.The highest possible scores on the Critical Reading and Math sections will remain 800each,making 2,400a perfect score on the new SAT.

72.Which parts are included in the writing section of SAT according to the passage?A
A.Essay and multiple-choice.             B.Essay and critical writing.
C.Multiple-choice and math.              D.Multiple-choice and literature.
73.In Paragraph 3,the writer of this passage mainly describedD.
A.a(chǎn)pplication of the Internet in scoring the essay
B.relationship between high tech and testing
C.cheating in the essay scoring procedure
D.the scoring procedure of the essay
74.Which of the following statements is NOT true according to the passage?B
A.The SAT is designed for high school seniors wishing to enter a college.
B.The writer criticized the multiple-choice in the SAT.
C.Good specific examples are encouraged in essay writing.
D.The SAT consists of the Critical Reading,Math and the Writing sections.
75.Which of the following would be the best title for this passage?D
A.The new SAT scoring.                B.Language testing reform.
C.College entrance exam reform.       D.The new writing section of SAT.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

12.Fujitsu,a Japanese technology company,has created a system capable of simultaneously(同時地)charging multiple portable electronic devices such as mobile phones,digital cameras and laptop computers without the need for cable connections.
Electric cars users may also eventually be able to charge their vehicles wirelessly using the same technology,said the company,which developed a sample system at Osaka Prefecture University.Claiming to be the world s first of its kind,the technology works on the basis of the transmission of electricity using magnetic fields between the charger and the electronic device.
The system enables wireless charging at distances of up to several meters.With the final aim of installing public"charging spots"on the streets in order to enable easy charging around the clock,scientists at Fujitsu Labs are planning to commercially sell products incorporating the new wireless charging system as early as 2012 but have not yet decided how much they would cost.
‘This technology paves the way to integrating compact wireless charging functions into mobile phones and enabling multiple portable devices to be charged simultaneously without any restrictions on their position relating to the charger,"the company said in a statement.
Mobile phone users in Japan can currently charge their batteries using the disposable portable plug-in battery 一 operated device,available at most train stations and convenience stores.However,phone companies warn long time use of it can damage the phones.
The company added,"We are also looking at applying the results of this work to fields other than portable electronics,including power transmission between circuit boards (電路板)or computer chips,and providing mobile charging systems for electric cars."
72.This passage is most probably taken fromC.
A.a(chǎn)n instructive brochure
B.readers feedback
C.a(chǎn) news report
D.a(chǎn) brief introduction
73.Which of the following can best describe the striking feature of this system?C
A.It enables wireless charging at distances of up to several miles
B.It enables you to charge your device very easily beside the clock
C.It is wireless and makes multiple charging at the same time
D.It can be bought at any formal supermarkets in the city
74.The underlined word"it"in paragraph 5 refers toA.
A.the device B.the system C.the phone D.the battery
75.The best title for the text would beC.
A.Fujitsu,a famous Japanese company
B.power transmission between circuit boards
C.new wireless charging system developed
D.mobile phones damaged by charging.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

9.We may all have had the embarrassing moment:Getting half-way through a story only to realize that we've told this exact tale before,to the person we're boring with it now.Why do we make such memory mistakes?
According to research published in Psychological Science,it may have to do with the way our brains process different types of memory.
Researchers Nigel Gopie,of the Rotman Research Institute in Toronto,and Colin Macleod,of the University of Waterloo,divided memory into two kinds.The first was source memory,or the ability to keep track of where information is coming from.The second was destination memory,or the ability to recall who we have given information to.
They found that source memory functions better than destination memory,in part because of the direction in which that information is travelling.
To study the differences between source and destination memory,the researchers did an experiment on 60university students,according to a New York Times report.The students were asked to associate 50random ( 隨意的) facts with the faces of 50famous people.Half of the students"told"each fact to one of the faces,reading it aloud when the celebrity's picture appeared on a computer screen.The other half read each fact silently and saw a different celebrity picture afterward.
When later asked to recall which facts went with which faces,the students who were giving information out (destination memory) scored about 16percent lower on memory performance compared with the students receiving information (source memory).
The researchers concluded that out-going information was less associated with its environmental context (背景)----that is,the person----than was incoming information.
This makes sense given what is known about attention.A person who is giving information,even little facts,will devote some mental resources to thinking about what is being said.Because our attention is finite(有限的),we give less attention to the person we are giving information to.
After a second experiment with another group of 40students,the researchers concluded that self-focus is another factor that  undermines destination memory.
They asked half the students to continue giving out random information,while the other told things about themselves.This time around,those who were talking about themselves did 15percent worse than those giving random information.
"When you start telling these personal facts compared with non-self facts,suddenly destination memory goes down more,suggesting that it is the self-focus component (成分) that's reducing the memory,Gopie told Live Science.

66.The point of this article is toC.
A.give advice on how to improve memory
B.say what causes the memory to worsen
C.explain why we repeat stories to the same person
D.introduce different kinds of memories
67.Those who read each fact silently and saw a different celebrity picture afterwardA.
A.can memorize more information
B.have worse memory
C.a(chǎn)re more likely to repeat stories
D.paid more attention to themselves
68.The person who is giving informationB.
A.may receive little facts
B.focuses more on what he is saying
C.has finite attention
D.says much attention to his own behavior
69.The underlined word"undermines"probably meansA.
A.weakens      B.benefits   
C.explains     D.supports
70.What did the scientists conclude from the second experiment?D
A.Destination memory is weaker than source memory.
B.Focusing attention on oneself leads to relatively poor source memory performance.
C.Associating personal experience with information helps people memorize better.
D.Self-focus is responsible for giving information twice or more to the same person.

查看答案和解析>>

科目:高中英語 來源: 題型:短文改錯

10.假定英語課上老師要求同桌之間交換修改作文,請你修改你同桌寫的以下作文.文中共有10處語言錯誤,每句中最多有兩處.每處錯誤僅涉及一個單詞的增加、刪除或修改.
增加:在缺詞處加一個漏字符號(∧),并在其下面寫出該加的詞.
刪除:把多余的詞用斜線(\)劃掉.
修改:在錯的詞下劃一橫線,并在該詞下面寫出修改后的詞.
注意:1.每處錯誤及其修改均僅限一詞;
2.只允許修改10處,多者(從第11處起)不計分.
As middle school student,not only should we acquire knowledge but also we should have good qualities.I think express our gratitude to people ho helped us is one of the good qualities we must have.Two years before,my classmate,Wang Wei ran into difficulty because his father is diagnosed with lung cancer.His father's illness added to his family's trouble,but Wang Wei was in danger dropping out of school.After learning about his bad situation,our head teacher gave him timely help by allowing him to continue his schooling with any tuition.With the help of the teacher and classmates,Wang had finished chool.Jst before this important exam he wrote us a letter expressing his sincerely thanks for all what we have done.

查看答案和解析>>

同步練習冊答案