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 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（晶體） 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.

1．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

2．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

3．The underlined word “properties” in the fourth paragraph probably means        .

       A．possessions         B．qualities               C．reactions             D．symbols

4．What would be the best title for the passage?

       A．High-tech Products                              B．Nano Cups

       C．Nano Materials                                    D．High-teach Research

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2011-2012學(xué)年山東省濟(jì)南外國(guó)語學(xué)校高一下學(xué)期期中英語試卷（帶解析） 題型：閱讀理解

Lily，Susan, David, Chris和Michael分別計(jì)劃假期去景點(diǎn)旅游，閱讀下面旅游雜志上的6個(gè)旅游廣告（A、B、C、D、E和F），從中找出符合5位興趣愛好的最佳選項(xiàng)，選項(xiàng)中有一項(xiàng)是多余選項(xiàng)。
1. David：I like a relaxed and simple lifestyle.
2. Lily：I enjoy shopping, dining and nightlife. I want to surf and learn about Hawaiian culture.
3. Susan：I like a relaxed lifestyle. I want to take a scenic helicopter and watch the amazing eruptions( 火山噴發(fā)) of red-hot lava.
4.Chris：I like surfing and mountain-climbing and enjoy shopping, dining and nightlife.
5. Michael：I love outdoor activities and want to take a scenic helicopter.

A  Oahu Island – the gathering place
Home to 80 per cent of Hawaii’s people, Oahu lets you enjoy the bustling and colourful city life of Honolulu, and world-famous Waikiki beach. Glamorous Waikiki is the main place for sun and surf. Otherwise go swimming, snorkeling, or relax and sunbathe on the many other fabulous beaches. Oahu is the place to be for shopping, great dining and great nightlife! But if nightclubs aren’t your scene, you may like to visit the museum at Pearl Harbour, or climb Nuuanu Oali mountain to find the best view of the whole island.
B  Hawaii – the big island
Hawaii is also the name of the biggest island of the group. If you’d like a more relaxed lifestyle with friendly locals, then the Big Island has plenty of room for you. Take a helicopter ride around snow-capped Manna Kea, the highest mountain in the world if you measure from the ocean floor. Or visit Kilauea, the world’s largest active volcano（活火山）. Hawaii’s dramatic black lava landscape even include beaches with black sand.
C  Kauai – the garden island
Small and uncrowded, Kauai is the perfect gateway for families and couples looking for a peaceful holiday. It has world-class golf courses, with great views! This island is ideal for those who love outdoor activities. The beautiful green Na Pali cliffs and coast are a great place to go camping, hiking and horse riding. You can go kayaking on the river, or take scenic helicopter flights.
D  Maui – the rainbow island
Maui combines beautiful scenery with luxury resort-style living. No matter where you stay, you’ll see many wonderful rainbows. Of course there are the lovely beaches for snorkeling, surfing and whale watching, but you can also hike up Haleakala, the world’s largest inactive volcano. The town of Lahaina offers a lu’au - a fun evening of hula dancing and traditional banquet. It isn’t as busy as Waikiki, but there are still plenty of shopping, fine restaurants and nightlife.
E  Lanai – Hawaii’s best-kept secret
Far away from the crowds, this island offers you a totally relaxing experience. It is a haven for all kinds of wildlife. You can go fishing on the deserted beaches, or just laze there. Maybe you can climb Lanaihale mountain. From the top you can see all the other islands.
F  Molokai – very different
The lifestyle here lets you understand the way Hawaii was many years ago. If you’re looking for a total escape from a busy city life, this is definitely the place. Forget shopping, fancy dining and nightlife. Let a guide bring you on a horseback or bicycle tour of the rugged but beautiful scenery. Hike over the stunning cliffs of the Kalaupapa peninsula. The most important thing to do on Molokai, though, is relax and slow down.

查看答案和解析>>

科目：高中英語 來源：山東省淄博市2010屆高三下學(xué)期第一次模擬考試 題型：閱讀理解


C
A new study in West Africa shows how farm irrigationsystems powered by the sun can pro-duce more food and money for villagers． The study-in Benin found that solar - powered pumpsare effective in 8upplying water, especially during the long dry season．
Sub - Saharan Africa is the part of the world with the least food security． The United Na-tions Food and Agriculture Organization estimates that more"than one biillion of the world' s peo-ple faced hunger last year．Around 265 million of them live'south of the Sahara Desert:  Lack of  rainfallis one oftheir main causes offood shortages．．
Jennifer Bumey from Stanford University in Califomia led the study．The research team helped build three solar - powered drip irrigation -（滴灌） ,systems in northem Benin． Between 30 and 35 women used each system to pump water from the ground or a stream．Each woman was responsible for farming her own 120 sqrurre meters of land． They also farmed other land  collectively．
The solar - powered irrigation systems produced an average of nearly two tons of vegetables per montb． During the first year, the women．kept a monthly average of almost rune kilograms of vegetables for home use．They sold the surplus produce at local markets． The eamings greatly increased their ability to buy food during the dry season which can last six to nine months． Peo- ple in the'two villages with the systems were able to eat three to five more servingsof yegetables per day．But making the surplus available at markets also had a wider effect．
The study compared the villages with two others where women farmed with traditional methods like carrying water in buckets． The amount of vegetables eaten in those villages also  increased, though not as much．The researchers note that only four percent of the croplamd in sub - Saharan Africa is irrigated． Using solar power to pump water has higher costs at first． But    the study says it can be more economical in the long term than using fuels like gasoline,  diesel  or kerosene． And solar power is environmentally friendly．
66．Food security in Sub - Saharan Africa is insufficient mainly because of
A．lack of rainfall         B．limitation of farmland
C． a small crop variety   D．little sunlight
67．From the third paragraph we know that _______．
A．water is wasted by using the system
B． the farmers imgate the land together
C． all farmers use irrigation systems in northem Benin
D． the solar - powered systems take up more manpower
68．The underlined word "surplus" in the 4th paragraph most probably means_______
A．special             B．unnecessary      C．extra      D．a(chǎn)bandoned
69．Usinf．solar power to pump water has advantages EXCEPT that
A．solar energy has higher cost at first
B．solar power helps to protect environment
C．solar power helps farmers increase eanungs
D． solar energy can be more economical in the long run
70．What can be the best title for the text?
A．Manpower affects rainfallin Africa
B．Irrigation by carrying water in buckets
C．Solar - powered pumps aid African farmers
D．Vegetable supply increased in African villages

查看答案和解析>>

科目：高中英語 來源：遼寧省沈陽市2010屆高三下學(xué)期教學(xué)質(zhì)量監(jiān)測(cè)（二） 題型：閱讀理解






B
Avatar
Venue: Orient Pioneer Theater
Date: January 2
Price (￥): 150/180/240/300
Tel: 400 – 810 – 3721
Additional Information:
The film is directed by James Cameron. In the future, Jake, a paraplegic war veteran, is brought to another planet, Pandora, which is inhabited by the Na’vi, a humanoid race with its own language and culture. Those from Earth find themselves at odds with each other and the local culture. The fierce war unfolded …
Farewell My Concubine
Venue: National Centre for the Performing Arts
Date: January 2
Price (￥): 50/80/100/300
Tel: 400 – 810 – 8271
Additional Information:
Peking Opera tells the story of XiangYu (232BC – 202BC), the self – styled Hegemon – king of Western Chu (modern provinces of Hubei, Huan, Jiangxi, Anhui and Jiangsu) who battled to unify China with LiuBang, the final founder of the powerful Han Dynasty.
Guo Degang Cross Talk Show
Venue: Cultural Palace of Nationalities
Date : January 24 – 25
Price (￥): 100/200/300/500
Tel: 400 – 610 – 2270
Additional Information:
Guo Degang is a famous Chinese cross talk actor.
Confucius
Venue : Today Art Theater
Date : January 20
Price (￥): 100/120/150/180
Tel: 400 – 610 – 3721
Additional Information:
    The film is about Confucius, who was a Chinese thinker and philosopher. His teachings and philosophy have deeply influenced Chinese, Korean, Japanese and Vietnamese though and life.
40．If you want to appreciate the Chinese traditional opera, you can call         
A．Tel: 400 – 810 – 3721     B．Tel: 400 – 810 – 8271
C．Tel: 400 – 610 – 2270     D．Tel: 400 – 610 – 3721
41．What can we learn from four posters?
A．Avatar, directed by James Cameron, is a scifi movie.
B．Confucius can be seen in Oriental Pioneer Theatre.
C．You can enjoy Guo Degang’s cross talk on Jan. 20.
D．Xiang Yu finally founded the powerful Han Dynasty.
42．The underlined phrases “at odds” probably means        
A．in harmony      B．in disagreement       C．in touch    D．in common

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

Avatar

Venue: Orient Pioneer Theater

Date: January 2

Price (￥): 150/180/240/300

Tel: 400 – 810 – 3721

Additional Information:

The film is directed by James Cameron. In the future, Jake, a paraplegic war veteran, is brought to another planet, Pandora, which is inhabited by the Na’vi, a humanoid race with its own language and culture. Those from Earth find themselves at odds with each other and the local culture. The fierce war unfolded …

Farewell My Concubine

Venue: National Centre for the Performing Arts

Date: January 2

Price (￥): 50/80/100/300

Tel: 400 – 810 – 8271

Additional Information:

Peking Opera tells the story of XiangYu (232BC – 202BC), the self – styled Hegemon – king of Western Chu (modern provinces of Hubei, Huan, Jiangxi, Anhui and Jiangsu) who battled to unify China with LiuBang, the final founder of the powerful Han Dynasty.

Guo Degang Cross Talk Show

Venue: Cultural Palace of Nationalities

Date : January 24 – 25

Price (￥): 100/200/300/500

Tel: 400 – 610 – 2270

Additional Information:

Guo Degang is a famous Chinese cross talk actor.

Confucius

Venue : Today Art Theater

Date : January 20

Price (￥): 100/120/150/180

Tel: 400 – 610 – 3721

Additional Information:

    The film is about Confucius, who was a Chinese thinker and philosopher. His teachings and philosophy have deeply influenced Chinese, Korean, Japanese and Vietnamese though and life.

40．If you want to appreciate the Chinese traditional opera, you can call         

         A．Tel: 400 – 810 – 3721         B．Tel: 400 – 810 – 8271

         C．Tel: 400 – 610 – 2270         D．Tel: 400 – 610 – 3721

41．What can we learn from four posters?

         A．Avatar, directed by James Cameron, is a sci – fi movie.

         B．Confucius can be seen in Oriental Pioneer Theatre.

         C．You can enjoy Guo Degang’s cross talk on Jan. 20.

         D．Xiang Yu finally founded the powerful Han Dynasty.

42．The underlined phrases “at odds” probably means        

         A．in harmony         B．in disagreement         C．in touch      D．in common

查看答案和解析>>

科目：高中英語 來源： 題型：

 Though ________ by Serena Williams of the U.S., Li Na still realized her dream of moving up to top 3 in Women’s Tennis Association rankings.

   A. defeating                 B. to defeat                  C. defeated                 D. being defeated

查看答案和解析>>

同步練習(xí)冊(cè)答案