Snow-melting Agent
A heavy snow can kill pests and this means a good harvest next year.This will bring as well as trouble to urbanites.
On Nov.16,2003,a cold air current brought a heavy snow to Beijing.To prevent traffic jams,related government departments mobilized people to clear off snow on streets.
One of the most effective ways to clear off snow on roads is to scatter snow-melting agent on the roads.The major component of the snow-melting agent is salt.The snow-melting agent can make snow stop from freezing,make it easier to clear off the road,and allow traffic to flow smoothly.But it also brings about some hidden dangers.In the spring of 2003,over 300 000 trees in Beijing urban districts died.After analyzing soil around these trees,experts discovered that the salt content of these soils was 392 times higher than normal.Where did the excessive salt come from?After investigating,forestry experts found that when clearing snow in the winter,people usually heap snow containing snow-melting agent at trees’ roots,and that when the snow melts,this agent penetrates the soil and increases its salt content.The snow-melting agent indirectly killed the trees.
Statistics show that during a heavy snow in 2002,over 1000 tons of snow-melting agent was scatterred on streets in Beijing.Snow water containing a large amount of snow-melting agent got into the soil through sewers.
In addition,salt in the snow-melting agent can expedite the corrosion of steel bars in concrete buildings and cause the concrete to crack and peel,shortening the life of roads.
Scientists and government officials are required to solve traffic problems caused by heavy snows as soon as possible and at the same time try to reduce the negative effects of the snow-melting agent.This is a difficult problem placed before them.Related authorities have framed some local criteria to regulate the production and use of snow-melting agents.
Now,more harmless snow-melting agents are being developed.Now that even snow-melting agents that meet today’s criteria must still be used carefully,we have to rely more on our manpower and machines to clear off snow.
This year,in addition to using snow-melting agents,Beijing will use a large number of snow vehicles to clear snow on roads.In more places,citizens are mobilized to clear snow with their hands.This may be a test of a city’s civilization level.
小題1:Salt is a snow-melting agent while _________ is a cleaning agent.
A.waterB.soapC.a(chǎn) washing-machineD.a(chǎn) housewife
小題2:The third paragraph of the text is mainly about _______.
A.the side effect of snow-melting agent
B.a(chǎn) case of damage to trees caused by snow-melting agent
C.the results of using snow-melting agent
D.the uses of snow-melting agent
小題3:According to the text,the most practical way to clear off snow is to _________.
A.use snow-melting agent as much as possible
B.only use more harmless snow-melting agent
C.encourage people to clear snow with their hands
D.use more snow vehicles
小題4:This text most probably appears in_________.
A.a(chǎn) newspaperB.a(chǎn) magazine on latest findings
C.a(chǎn) book on saltD.a(chǎn) magazine on environmental protection

小題1:B
小題2:C
小題3:C
小題4:D

小題1:通過類比猜詞義。
小題2:從第三段第三句和第四句可知。
小題3:從最后一段第二句和倒數(shù)第二段第二句可知。
小題4:概括主題,推斷出處。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:不詳 題型:完形填空

  I don't know what's your opinion about mountains.
  It was only in the eighteenth century  people in Europe began to  that mountains were beautiful.  that time, mountains were feared by the people on the plain, especially by the city people, they were wild and  places  one was easily  or killed by terrible animals.
  Slowly, however,  people  comfortably in the towns began to grow  them. They began to feel  looking for wild excitement, as their attention turned from the man-made town to the country; and to places  dangerous and wild. So high mountains began to be  for a holiday.
  Then, mountain-climbing began to grow popular  To some people, there is something  about getting to the  of a high mountain: a struggle against nature is finer than a battle  other human beings. And after a difficult climb, what a  reward it is to look down on everything within sight.
  36.A. when     B. which     C. that      D. and
  37.A. regret    B. seem     C. hope       D. think
  38.A. After     B. Before    C. During     D. At
39.A. lived     B. living     C. to live     D. who living
  40.A. whom     B. for whom   C. with whom   D. to whom
  41.A. danger     B. dangerous   C. dangerously   D. dangerless
  42.A. that      B. which     C. where     D. in where
  43.A. lost      B. missed     C. found     D. searched
44.A. many     B. much     C. many the    D. a lot
  45.A. that living           B. who were living
     C. that were lived          D. who living
  46.A. tiring with   B. tiring of    C. tired with    D. tired of
 47.A. interesting   B. interest in   C. interested    D. interested in
  48.A. untouched   B. touched    C. untouching   D. touching
  49.A. where was           B. which were
    C. which that was          D. which it was
50.A. excited     B. expensive    C. popular    D. terrible
  51.A. for sport            B. as a sport
    C. with a sport           D. like a sport
   52.A. pleasure            B. pleased
    C. pleasant            D. unpleasant
53.A. top          B. middle  C. bottom    D. foot
  54.A. about          B. for   C. without    D. against
  55.A. disappointed           B. satisfied
    C. satisfactory           D. disappointing

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

What is Bay? The simple answer is that it is a global trading platform where nearly anyone can trade practically anything. People can sell and buy all kinds of products and goods. Including cars, movies and DVDs, sporting goods, travel tickets, musical instruments, clothes and shoes- the list goes on and on 
The idea came from Peter Omidyar, who was born in Paris and moved to Washington when he was still a child, At high school, be became very interested in computer programming and after graduating from Tuft University in 1988, He worked for the next few years as a computer engineer. In his free time he started Bay as a kind of hobby, at first offering the service free by word of mouth. By 1996 there was so much traffic on the website that he had to upgrade(升級(jí)) and he began charging a fee to members. Joined by a friend, Peter Skill. and in 1998 by his capable CEO, Meg Whitman, he has never looked back. . Even in the great. com crashes of the late 1990s,abay has gone from strength to strength ,. It is now one of the ten most visited online shopping websites on the Internet 
eBay sells connections, not goods, putting buyer and seller into contact with each other. All you have to do is lake an e-photo, write a description, fill out a sales form and you are in business: the world is your market place. Of course for each item (商品)sold eBay gets a percentage and that is great deal of money. Every day there are more than sixteen million items listed on eBay and eighty percent of the items are sold.
小題1:We learn from the text that eBay provides people with__ 
A.a(chǎn) way of buying and selling goods
B.a(chǎn) website for them to upgrade
C.a(chǎn) place to exhibit their own photos
D.a(chǎn) chance to buy things at low prices
小題2:Why did Peter create eBay after graduating from university? 
A.For fun
B.To make money
C.For gathering the engineers
D.To fulfill a task of his company
小題3:From “he has never looked back “in Paragraph 2 we learn that peter_ 
A.did not feel lonely
B.was always hopeful
C.did not think about the past
D.became more and more successful
小題4:How does eBay make money from its website7? 
A.By bringing callers together.
B.By charging for each sale
C.By listing items online
D.By making e-photos.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:完形填空


One of my fondest memories as a child is going by the river and sitting idly(閑散地)on the bank. There I would enjoy the peace and___1___, watch the water ___2__downstream, and listen to the chirps(喳喳聲)of the birds and the rustling (沙沙聲)of the leaves in the trees. I would  also___3___the bamboo trees___4___under pressure from the wind and watch them ___5____gracefully to their upright or ___6___ position after the wind had___7____. When I think about the bamboo tree’s ___8____to bounce back or return to it’s original position, the word resilience(彈性)__ 9___to mind. When used in ___10_____ a person , this word means the ability to readily _11__from shock, depression or any other situation___12____stetches the limits of a person’s emotions. Have you ever felt like you are about to shout? Have you ever felt like you are at your __13__point?__14__, you have survived the experience to live to talk about it. During the experience you probably felt a mix of __15____that threatened your health. You felt emotionally tired,___16_____ exhausted and you most likely endured unpleasant physical symptoms.
Life is a __17__ of good times and bad times, happy moments and unhappy moments. The next time you are __18___one of those bad times or unhappy moments that take you __19____to your breaking point, bend but don’t break. Try your best not to let the situation get the best of you. A measure of hope will__20__ you through the unpleasant test.
1.A. quiet  B. beautiful     C. noisy     D. happy
2.A. flow    B. rush     C. go     D. come
3. A. see     B. notice    C. watch   D. look at
4.A. bend    B. swing    C. break   D. tremble
5.A. return   B. recover  C. give   D. fly
6.A. straight  B. original  C. quick  D. necessary
7.A. died from  B. died out C. died down  D. died off
8.A. ability   B. power C. energy  D. strength
9.A. strikes  B. goes   C. appears  D. comes
10.A. preference to  B. conference to C. reference to D. appearance to
11.A. recover  B. calm  C. comfort  D. sink
12.A. where   B. that   C. when  D. in which
13.A. high   B. low   C. breaking   D. returning
14.A.Thankfully B. Hopefully  C. Happily  D. Surprisingly
15.A. senses  B. emotions  C. thoughts  D. minds
16.A. physically  B. mentally  C. patiently  D. fully
17.A. way     B. mixture   C. condition    D. feeling
18.A. experiencing  B. making   C. living  D. meeting
19.A. away  B. far  C. close   D. fast
20.A. bring  B. take  C. make  D. set

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


Shopping is not as simple as you may think! There are all sorts of tricks at play each time we reach out for that particular brand(品牌) of product on the shelf.
Coloring, for example, varies according to what the producers are trying to sell. Health foods are packaged(包裝)in green, yellow or brown because we think of these as healthy colors. Ice cream packets are often blue and expensive goods, like chocolates, are gold or silver.
When some kind of pain killer was brought out recently, researchers found that the colors turned the customers off because they made the product look weak and ineffective. Eventually, it came on the market in a dark blue and white package because we think of it as safe, and white as calm.
The size of a product can attract a shopper. But quite often a bottle doesn’t contain as much as it appears to.
It is believed that the better-known companies spend, on average, 70 percent of the total cost of the product itself on packaging!
The most successful producers know that it’s not enough to have a good product. The founder of Pears soap, who for 25 years has used pretty little girls to promote(推銷) their goods, came to the conclusion: “Any fool can make soap, but it takes a genius(天才)to sell it.”
小題1:Which of the following may trick a shopper into buying a product according to the text?
A.The cost of its package.
B.The price of the product.
C.The color of its package.
D.The brand name of the product.
小題2: The underlined part “the colors turned the customers off”(in Para.3) means that the colors ____.
A.a(chǎn)ttracted the customers strongly
B.had weak effects on the customers
C.tricked the customers into shopping
D.caused the customers to lose interest
小題3: Which of the following is the key to the success in product sales?
A.The way to promote goods.
B.The discovery of a genius.
C.The team to produce a good product.
D.The brand name used by successful producers.
小題4:Which of the following would be the best title for this text?
A.Choice of Good Products
B.Disadvantages of Products
C.Effect of Packaging on Shopping
D.Brand Name and Shopping Tricks

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

For many the only way to enjoy Ireland’s fantastic and breathtaking scenery is to take to the open road on a motoring holiday. It’s true to say that motoring can still be a pleasure on roads so empty of the traffic you are used to. You can choose your own route or let us suggest one or two. You can pre-book all your accommodation or just go as you please. You can choose your accommodation from good quality hotels in coast or country, village or city, guesthouses, town and country homes or farmhouses throughout the island. Naturally we will supply you with a good quality map to help you around.
Our Value Motoring holiday includes a wide selection of hotels and guesthouses. All hotels are fully licensed and certain guesthouses (as indicated) are also licensed. Bed and full Irish breakfast for 2 or 6 nights is indicated in your holiday price. Hotel and guesthouse gratings are shown by a figure in brackets (括號(hào)) after the name of each of the places. Facilities available are also shown after the grading. You may choose to travel on a Go As You Please or a pre-booked basis. On a Go As You Please holiday only the first night is booked for you in advance. For the rest of your holiday you book ahead as you travel (hotel reception will help) using the information lists we provide. A slight note of caution (警告) — in July and August it is advisable to book 2 or 3 days ahead. If you prefer to plan your holiday in advance then we will pre-book all accommodation for you. Just complete the booking form carefully using hotel codes indicated. If your first or second choice is not available we will book an alternative in the same place.
1 Why did the writer say a motoring holiday is the only way for many to enjoy the beauty of Ireland? Because____________.
A. travelers can go sightseeing at many places
B. its price is low and travelers feel comfortable
C. travelers can drive and choose the route freely
D. travelers have many good quality hotels to choose from
2. How many ways of accommodation does a motoring holiday supply?
A. Two            B. Four             C. Six              D. Eight
3. If the travelers choose to travel on a Go As You Please holiday, the travel agency will _____.
A. do nothing to help them                          B. only pre-book the first night for them
C. pre-book all the accommodation for them.           D. charge them less for the service
4. Supposing the travellers’ accommodation choices aren’t available in the tourism season, the travel agency will___________.
A. give up serving them                     B. choose one for them in another place
C. book an alternative in the same place        D. only book the first night for them

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


Dear Hamilton,
We are fortunate that in such a large, high-pressure office we all get along so well. You are one of the people who keep the social temperature at such a comfortable setting. I don’t know anyone in the office who is better liked than you.
You can perhaps help with this. The collection of contributions towards gifts for employees’ personal-life events is becoming a little troubling. Certainly, the group sending of a gift is reasonable now and then. In the past month, however, there have been collections for two baby shower gifts, one wedding shower gift, two wedding gifts, one funeral(葬禮)remembrance, four birthday gifts, and three graduation gifts.
It’s not only the collected-from who are growing uncomfortable (and poor), but the collected-for feel uneasy receiving gifts from people who don’t know them outside the office, who wouldn’t even recognize their graduating children, their marrying daughters and sons, or their dead relatives.
This is basically a kind gesture (and one that people think well of you for), but the practice seems to have become too wide-ranging and feels improper in today’s office setting.
Thank you for understanding.
小題1:The underlined word “contributions” probably means ________.
A.moneyB.suggestions C.reportsD.understanding
小題2:Hamilton is expected to _______.
A.show more kindness.B.discontinue the present practice
C.quit being the organizer for gift givingD.know more about co-workers’ families
小題3:This is basically a letter of ________.
A.a(chǎn)pologyB.sympathyC.a(chǎn)ppreciationD.dissatisfaction

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Children and teenagers who spend lots of time in front of screens---especially TVs---are   easier to get more weight as they grow, according to a new study.
The findings agree with the research suggesting all that inactive sitting and always watching   advertisements may lead to poor eating habits.
Researchers used results from a long-term study of children who took part in the surveys every two years. Children were between ages 9 and 16 when the study started. Out of 4,300 girls in the   study, 17 percent were overweight or obese(肥胖的). Twenty-four percent of the 3,500 boys   were also above a healthy weight.
The surveys included questions about their height and weight as well as how much time they spent watching TV and DVDs and playing computer and video games.
From one survey to the next, each one-hour increase in children’s daily TV watching was in connection with an increase of about 0.1 points on a body mass index (BMI)(體質(zhì)指數(shù)), which measures weight in connection with height. There’s an increase of about half a pound in weight per extra hour of TV.
“The weight of the evidence is so strong that television watching is connected with unhealthy changes in weight among youth,” says Jennifer Falbe, who led the study while at the Harvard School of Public Health in Boston.
“It's important for parents to know that all the obesity-causing(引起肥胖的)screens really should be limited in their children's lives.” Falbe says. “When children watch TV, there are many food advertisements on TV that might lead them to eat a cookie or drink a soft drink.” What's more, she says, “they can get into a hibernating(冬眠) state on the sofa, even if children are sitting down while playing a computer game.”
小題1:Which of the following statements can be the best title for the text?
A.A new study on screens.
B.TVs do harm to children.
C.The less TV time, the fatter.
D.Too much screen time leads to obesity.
小題2: How many children took part in the study?
A.4,300B.3,500
C.7,800D.9,800
小題3:According to the study, one extra hour screen time will cause children about ______ pound
fatter.
A.0.1B.0.5
C.0.3D.0.7
小題4:According to Falbe , what should parents do to stop children getting fat?
A.Limiting the time of children watching TV.
B.Buying children food advertised on TV.
C.Not allowing children to watch TV.
D.Encouraging children to play computer games.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Quickly, the picture comes alive with hyperlinks (超鏈接), offering the names of the buildings, towers and street features that appear in the photo. The hyperlinks lead to information about the history, services and context of all the features in the photo. You have just hyperlinked your reality.
That might be a little unbelievable, but the technology exists and is no fevered imagination. This is not a cool small machine invented for the next James Bond movie; this is a working technology just developed by European researchers. It could be coming to a phone near you, and soon.
This, as the marketing types say, is a game changer. It develops a completely new interface (界面) that combines web-technology with the real world. It is big and fresh, but it goes much further and has much greater influence.
The development of the system is most outstanding because image recognition technology has long been pregnant with promise, but seemed to suffer from an unending labour.
Now MOBVIS has not only developed image recognition; it has also developed more applications for the technology; and it has adapted it to the world’s most popular technology: the mobile phone.
The MOBVIS system completely rewrites the rules for exploration and interaction with your physical environment. The system begins with panoramas (一連串景象). These panoramas form the basis of a city database. It can match buildings, towers, banners and even logos that appear in the panoramas.
A user simply takes a picture of the street feature, MOBVIS compares the user’s photograph to the panoramas and then identifies the buildings from the picture you take and the relevant links are returned.
Then you simply click on the links, using a touch-screen phone, and the MOBVIS system will provide information on the history, art, architecture or even the menu, if it is a restaurant, of the building in question.
67. Which is introduced in the passage?
A. A new game software.                                                 B. A popular mobile phone.
C. A cool small machine.                                              D. An image recognition system.
68. What can we learn about the new technology?
A. It can only be put into use on mobile phones.
B. It is a little unbelievable and just a fevered imagination.
C. It has taken an unending labor to bring the technology into our lives.
D. It will encourage the users to take more pictures of the street features.
69. What is the right order of the operation of MOBVIS?
a. A city database forms in the system.
b. MOBVIS recognizes the picture and links are returned.
c. A user touches the links on the phone screen.
d. A user takes a picture of the street feature.
e. MOBVIS provides information in question.
A. a; e; c; d; b;                        B. a; d; b; c; e            C. d; c; e; a; b                    D. c; a; e; b; d
70. From the passage, we can infer that _______.
A. MOBVIS has already been widely used all over the world
B. the writer is trying to promote the sales of the MOBVIS system
C. this new technology will soon be very popular in our lives
D. the sales of mobile phones will decrease as MOBVIS comes on market

查看答案和解析>>

同步練習(xí)冊答案