题目
题型:不详难度:来源:
Though “nanometer”(纳米) 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 1000 micrometers,and one micrometer is 1000 nanometers.That is,one nanometer is one billionth of a meter.Nano materials are solid materials composed of particles(粒子)or crystallites(晶体) of less than 100 nanometer 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 2 hydrogen atoms and 1 oxygen atom.It can be changed only by special manipulation of the atoms. The material constituting the cup can have ananometer particles . But it cannot change the chemical and physical properties of 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 up. It can also be included in the list of nano products in a certain sense. But the nano up has not changed its property and function as a cup. It is not a magical medicine for curing and health care.
72.Which of the following shows the right relationship?
A.nanometer<millimeter<micrometer<meter
B.micrometer<millimeter<nanometer<meter
C.nanometer<micrometer<millimeter<meter
D.millimeter<micrometer<nanometer<meter
73.It can be inferred from the passage that .
A.nano materials have been put into use in daily goods
B.real nano products haven’t become available for people
C.the nano cup is very effective in curing and health care
D.real nano products are being produced by some companies
74.The underlined word “properties” in the fourth paragraph probably means .
A.possessions B.qualities C.reactions D.symbols
75.What would be the best title for the passage?
A.High-tech Products B.Nano Cups
C.Nano Materials D.High-teach Research
答案
小题1:C
小题2:B
小题3:B
小题4:C
解析
核心考点
试题【 Though “nanometer”(纳米) is now a fashionable term all over the world, few people】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
第二节完形填空 (共20小题;每小题1.5分,满分30分)
阅读下面短文,掌握其大意,然后从36—55各题所给的四个选项(A、B、C和D)中,选出最佳选项, 并在答题卡将该项涂黑。
Brenda was a young woman who was invited to go rock climbing. 36 she was very frightened, she went with her 37 to a cliff. She took hold of the rope and started 38 the face of that rock. She got to a place where she could take a breath. 39 she was hanging on there, the safety rope suddenly struck Brenda’s eye and 40 her contact lens(隐形镜片).
Well, here she was, on a rock face, with hundreds of feet below her and hundreds of feet 41 her. She began to get 42 , and she had to pray to the Lord to help her to 43 it.
When she got to the top, a friend 44 her eye and her clothing for the lens, but there was no contact lens to be found. She 45 across the mountains, thinking of that verse(诗句) that says, “The 46 of the Lord run backward and forward throughout the whole earth.” She thought, “Lord, you can see all these 47 . You know every stone and leaf, and you know 48 where my contact lens is. Please help me.”
Finally, they 49 down the path to the bottom. At the bottom there was a new party of climbers just starting up the face of the cliff. Suddenly, one of them shouted out, “Hey, you guys! Anybody 50 a contact lens?”
Well, that would be 51 enough, but you know 52 the climber saw it? An ant was moving 53 across the face of the rock, carrying it on it’s back.
Brenda told her father about the story of the 54 , the prayer, and the contact lens. He then drew a picture of an ant carrying that contact lens with the words, “Lord, I don’t know why you want me to do this. I can’t eat it, and it’s awfully 55 .But if this is what you want me to do, I’ll carry it for you.”
36. A. Although B. As C. Because D. Except
37. A. friend B. group C. guide D. leader
38. A. down B. off C. On D. up
39. A. Because B. As C. Before D. Until
40. A. wore out B. gave out C. carried out D. knocked out
41. A. over B. across C. beyond D. above
42. A. hopeful B. upset C. Eager D. proud
43. A. search B. dream C. find D. imagine
44. A. watched B. tested C. saw D. examined
45. A. looked up B. looked on C. looked out D. looked for
46. A. eyes B. arms C. hands D. legs
47. A. persons B. mountains C. trees D. animals
48. A. exactly B. simply C. generally D. nearly
49. A. walked B. climbed C. ran D. flew
50. A. missed B. owned C. got D. lost
51. A. annoying B. surprising C. disappointing D. worrying
52. A. which B. why C. when D. whether
53. A. Quickly B. happily C. slowly D. sadly
54. A. rock B. rope C. ant D. Lord
55. A. heavy B. light C.valuable D. dirty
High-tech machines have made life easier for millions around the world. However, some people still prefer low-tech ways of doing things. Here’s an example of why this is happening. You can microwave a frozen hamburger in 60 seconds. However, it won’t taste as good as one you cook on the stove. And if you’re in that much of a hurry, you probably won’t take time to toast the bun. High-tech cooking saves time, but it doesn’t make for better tasting meals.
Most people get their news from high-tech sources like television or the Internet. This has many advantages. For example, electronic news is more up to date than newspapers or magazines. It’s also more exciting to see live and videotaped news events than photographs. However, newspapers and magazines have some important advantages. They give more background and details. They also let you read the parts that are important to you and skip the rest.
Other high-tech timesavers have similar disadvantages. For example, most people use the phone or email to stay in touch with friends and family members who live in other places. But when you use the Internet or the phone, you don’t always think carefully about what you are saying, and sometimes you forget the important things you want to communicate. Similarly, when you word process a home work assignment instead of handwriting it, you can check your spelling electronically and put in fancy headings. However, some students are so busy with the computer that they don’t pay enough attention to the actual words they are writing.
72. Which of the following statements is TRUE according to the passage?
A. The writer likes high-tech cooking.
B. Low-tech cooking produces better-tasting meals.
C. High—tech news programs always keep you reading what is important to you.
D. Handwritten homework is better than word-processed homework.
73. How does the writer feel about high—tech tools?
A. Better late than never. B. Easy come, easy go.
C. Every coin has two sides. D. Learn to walk before you run.
74. What is the main subject discussed in the text?
A. High—tech vs. low—tech.
B. Advantages vs. disadvantages.
C. Newspapers and magazines vs. television and the Internet.
D. Word—processing vs. handwriting.
75. How is the text organized?
A. Main idea — Argument — Explanation.
B. Opinion — Discussion — Description.
C. Topic — Comparison — Supporting examples.
D. Introduction — Supporting examples — Discussion.
If you are slow in speaking, don’t worry. One of the helpful ways is by reading, either aloud or to yourself. The important thing is to choose something interesting to read. It can’t be too difficult for you. When you are reading in this way, don’t stop to look up the words if you can guess their meanings or if they have nothing important to do with the sentence. You can do that some other time.
小题1:From the passage we know the groundwork is ___ while you are learning a foreign language.
A.reading | B.writing | C.speaking | D.listening |
A.pay attention to speaking only |
B.try not to make mistakes |
C.correct mistakes only |
D.keep a diary and write notes, letters or articles |
When you find some new words in reading, you shouldn’t ___
A.guess their meaning | B.go on reading |
C.stop to look them up in the dictionary | D.keep on reading the important sentence |
A.How to Learn a Foreign Language | B.How to Improve Reading |
C.How to learn Writing | D.More reading, .Less speaking |
Because plants cannot move or talk, it is believed that they have no feelings and that they cannot receive signals from outside. However, this may not be completely true.
People who studied plants have found out that plants carry a small electrical charge (电荷). It is possible to measure this charge with a small piece of equipment called “galvanometer”. The galvanometer is placed on a leaf off the plant, and it records any changes in the electrical field of the leaf. Humans have a similar field which can change when we are shocked or frightened.
A man called Backster used a galvanometer for his studies of plants and was very surprised at his results. He found that if he had two or more plants in a room and he began to destroy one of them - perhaps by pulling off its leaves or by pulling it out of its pot - then the galvanometer on the leaves of the other plants showed a change in the electrical field. It seemed as if the plants were signalling a feeling of shock. This happened not only when Backster started to destroy plants, but also when he destroyed other living things such as insects (昆虫).
Backster said that the plants also knew if someone had destroyed a living thing some distance away, because they signalled when a man who had just cut down a tree entered the room.
Another scientist, named Sauvin, achieved similar results to Backster’s. He kept galvanometers fixed to his plants all the time and checked regularly to see what the plants were doing. If he was out of the office, he telephoned to find out about the signals the plants were sending. In this way, he found that the plants were sending out signals at the exact times when he felt strong pleasure or pain. In fact, Sauvin could cause a change in the electrical field of his plants over a distance of a few miles simply by thinking about them.
60. Why was Backster surprised at the results of his studies?
A. Because he found someone had just cut down a tree.
B. Because he destroyed a plant by pulling it out of its pot.
C. Because he found that plants could move and speak after all.
D. Because he found that plants could express feelings of shock.
61. The plants sent out signals _____.
A. only when Backster Started to destroy plants
B. when Backster destroyed plants or other living things
C. only when he destroyed things such as insects
D. only when Backster placed the galvanometer on the leaves of the plants
62. The scientist called Sauvin _____.
A. did not agree with Backster’s ideas
B. did not get the same sort of results as Backster did
C. found out some of the same things that Backster did
D. got different results from Backster’s
63. Which of the following is true according to the passage?
A. The electrical charge plants carry may shock or frighten us.
B. A tree will signal when it has been cut down.
C. Sauvin could make his plants send out signals some distance away.
D. Plants have feelings because they can receive signals without moving.
A new study suggests that the round-the-clock(24小时不断的)availability that cell phone have brought to people’s lives may be taking a toll on family life.The study,which followed more than 1,300 adults over 2 years, found that those who consistently used a mobile phone throughout the study period were more likely to report negative “spillover’’ between work and home life—and,in turn, less satisfaction with their family life.
Spillover essentially(本质上)means that the line between work and home begins to become unclear.Work life may invade home life when a parent is taking job—related calIs at home,for instance--or family issues may start to take up work time.For example,a child may call mom at work,telling her "microwave exploded” explained Noelle Chesley,an assistant professor of sociology at the University of Wisconsin—Milwaukee and the author of the study. The problem with cell phones seems to be that they are allowing for ever more spillover between work and home.
This may be especially true for working women,the study found. Among men,consistent use of mobile phones seemed to allow more work issues to creep (潜入)into family time.But for women,the spillover tended to go in both directions. Being “connected” meant that work cut into home time,and family issues came into work life.
Cell phones seem to be opening more lines for stressful exchanges among family member.But there may be ways to control the spillover,according to Chesley.Employers, she said,could look at their policies on contacting employees after hours to make sure their expectations are “reasonable”.For their part,employees could decide that cell phones go off during family time, Chesley said.
64.What does the underlined phrase “taking a toll on’’ probably mean in Paragraph 1?
A. Explaining. B. Influencing. C. Damaging. D. Extending
65.According to Chesley,what is the best solution to the problem caused by cell
phones?
A. Refuse to use cell phones.
B. Separate work hours from family time.
C. Ignore coming calls during family time.
D. Encourage women to stay at home.
66.We can learn from the passage that ___________________.
A.spillover makes the line between work and home unclear
B.cell phones seem to be convenient to families
C.cell phones affect men as much as women
D.we can do nothing to solve the problem
67. What is the main idea of the passage?
A .How to control the negative spillover caused by cell phones.
B. Cell phones cause negative “spillover’’ between work and home life.
C. Consistent use of cell phones makes people feel less satisfied with their work.
D.How work life invades home life.
最新试题
- 1植物种子胚的结构包括( )A.胚根、胚轴、胚芽B.胚根、胚轴、胚芽、子叶C.胚根、胚轴、胚乳D.胚根、胚轴、胚乳、胚芽
- 22007年6月初,重庆市高速公路收费站对过往车辆实施计重收费,某同学结合所学物理知识设计了如图所示的计重原理图,以下说法
- 3如图所示,E、r为电源的电动势、内阻,R1(与线圈并联)、R2(与电容并联)为定值电阻,线圈L的直流电阻不计,C为电容器
- 4在不久前结束的全国政协十一届二次会议上,有一位女委员提交“应该将抗日战争由八年更改为十五年(注:实为十四周年)”的提案。
- 5某中学八(5)班学生最近发生了几起侵权事件,班主任王老师针对这一情况在班级里开展了维权宣传活动,如果你是班级一员,请你围
- 6下列语句中,没有语病的一项是 [ ]A.方舟子与韩寒的网络论战愈演愈烈,韩寒委托律师因侵犯名誉权为由,将方
- 7学会反思我们将会[ ]①更加清楚地了解自身的责任②更好的履行责任③在承担责任中不断成长④找出他人的缺点A.①②③
- 8实验室现有3种酸碱指示剂,其pH变色范围如下甲基橙:3.1~4.4石蕊:5.0~8.0酚酞:8.2~10.0用0.100
- 92005年12月起,我市开始推广使用乙醇汽油.乙醇汽油是由乙醇和普通汽油按一定比例混配形成的能源.乙醇汽油能有效改善油品
- 10分析表格资料后,请回答下列问题:类群我国已知种数世界已知种数百分比(%)哺乳动物581434213.4鸟类1244873
热门考点
- 1 Little Tommy was doing very badly in math. His parents h
- 2核酸是___的载体,存在于每个细胞中。核酸在生物体的____、____和____中有极其重要的作用。
- 3Mobile phones are an important business tool for farmers in
- 4已知x+1x=7,则x-1x的值为( )A.3B.±2C.±3D.7
- 5你认为下列哪项旅游项目不适合在埃及开展?[ ]A、乘船浏览尼罗河 B、骑骆驼在沙漠中旅行 C、享受地中海的阳光
- 6Early one morning the sub-inspector at a station at the othe
- 7“任何民族都是有自决权的,这是毫无疑问的事。历史的发展使我们的民族大家庭需要采取与苏联不同的另一种形式。每个国家都有它自
- 8为了迎接2010年广州亚运会,某大楼安装5个彩灯,它们闪亮的顺序不固定,每个彩灯彩灯闪亮只能是红、橙、黄、绿、蓝中的一种
- 9You will have to answer_____ your crimes one day. A.toB.forC
- 10在地球仪上,纬线指示[ ]A.东西方向 B.东北—西南方向 C.南北方向 D.西北—东南方向