The hole in the earth's protective ozone layer（臭氧層）won't repair itself until about two decades later than had been expected, scientists announced.
The ozone layer blocks more than 90 percent of the sun's ultraviolet radiation（紫外線輻射）, helping to make life on Earth possible. For many dacades, ozone was depleted（削減） by chlorine and bromine gas in the air. A hole in the ozone layer formed over the Southern Hemisphere.
Computer models had forecast that the hole would fill back in by 2050. An improved computer model forecasts the recovery won't occur until 2068. The model, fed with fresh data from statellites and airplanes, was supported by the fact that it accurately reproduced ozone levels in the Antarctic stratosphere（平流層）over the past 27 years.
The ozone hole is actually more of a broad region with less ozone than ought to occur naturally. It is not limited to Antarctica, as is often believed.
Over areas that are farther from the poles like Africa or the US, the levels of ozone are only three to six percent below natural levels. Over Antarctica, ozone levels are 70 percent lower in the spring. This new method allows us to more accurately estimate（估計）ozone-depleting gases over Antarctica, and how they will decrease over time, reducing the ozone hole area.
Paul Newman, a scientist,said that the ozone hole has not started to become smaller as quickly as expected. They figure it will not become much smaller until 2018, after which time the recovery should proceed more quickly. And the hole will not be filled in again until 2065.
小題1:According to the passage, the ozone layer _______
A．a(chǎn)bsorbs as much as sunlight as possible
B．protects man against ultraviolet radiation
C．controls the changes in temperature
D．prevents the production of carbon dioxide
小題2:The improved computer model is believable because _________
A．it was once proved by facts
B．it has been studied for 27 years
C．it was created by many scientists
D．it is related to satellites and airplanes
小題3:The underlined word “they” in the fifth paragraph refers to ________
A．the levels of ozone
B．ozone-depleting gases
C．the ozone holes
D．the areas far from the poles

小題1:B
小題2:A
小題3:B

試題分析：
小題1:B 細節(jié)題。根據(jù)第二段1,2行The ozone layer blocks more than 90 percent of the sun's ultraviolet radiation（紫外線輻射）, helping to make life on Earth possible.說明B正確。
小題2:A 細節(jié)題。根據(jù)第三段2,3，4行The model, fed with fresh data from statellites and airplanes, was supported by the fact that it accurately reproduced ozone levels in the Antarctic stratosphere（平流層）over the past 27 years.說明該模型在過去的27年中得到了證明，故A正確。
小題3:B 推理題。根據(jù)本句This new method allows us to more accurately estimate（估計）ozone-depleting gases over Antarctica, and how they will decrease over time, reducing the ozone hole area.
說明這里的they是指ozone-depleting gases，故B正確。
點評：本文講述的是臭氧層收到破壞，人們在采取模型進行模擬。以細節(jié)題的考查為主，在解答這類問題時要求學生抓住題干文字信息，采用針對性方法進行閱讀，因為這類題的答案在文章中可以直接找到。
練習冊系列答案
相關(guān)習題

科目：高中英語 來源：不詳 題型：閱讀理解

It has been two years since I published my first article on Yahoo!Contributor Network.I was very excited when I saw that what I had written was published on the Internet.
I recognized that the content sites such as Associated Content can provide a fertile ground for learning how to become a writer.I was thrifty(節(jié)儉的)—I could see that this was an open door for systematically(系統(tǒng)地)learning some basic writing skills without paying college tuition for classes,all to be finished at my own speed and without leaving the comfort of my own home.
During these past few years I gained enough experience and understanding of using Associated Content to try writing.I found writing for that site was not my cup of tea.However,my experience there was positive as I was rewarded with even more learning opportunities just by giving it a try.Through Associated Content I was introduced to the world of bolgs(博客).I decided to learn how to set up a blog myself.Now I’m interested in blogs and continue to work as a writer.
Writing for the content site Yahoo!Contributor Network gives me a chance of trying creative writing—news,reviews and numerous lifestyle issues.And all of these topics are my own choices.Then there is an opportunity to meet other writers.Yahoo!Contributor Network has a wonderful in-house messaging system that allows its writers to communicate easily with one another.Not all your tries are satisfactory and easy when you write for a content site,but the benefits are many if you try it.
My teacher once said,“If you don’t quit,you will win.”I have no desire to quit writing as I really enjoy it.My thanks go out to Associated content and yahoo!Contributor Network for all my progress in writing!And to my fellow writers—thank you so much for your support and friendship.May we continue in our efforts of inspiration for many years to come!
小題1:According to the author,_______.
A．people can read a lot of novels on Associated Content
B．Associated Content helps readers study writing regularly
C．Associated Content contributes to making one become a writer.
D．studying on Associated Content is rather expensive but convenient.
小題2:In the author’s eyes,writing for Associated Content was not______.
A．a(chǎn) job he can deal withB．his favorite thing
C．a(chǎn) difficult task for himD．meaningful work for him
小題3:What is the benefit that Yahoo!Contributor Network offers?
A．You can have all your articles published.
B．You can get a lot of rewards from the site.
C．You can use its information and messages for free.
D．You can easily communicate with other writers.
小題4:The author uses his teacher’s words to show that____.
A．he will stick to his writing career
B．his teacher gave him a lot of help
C．what his teacher said is really true
D．he has met much difficulty in writing
小題5:We can learn from the passage that____.
A．two years has passed since the author began writing
B．the author is grateful for the sites and his fellow writers
C．the author had his first book published on the Internet
D．the author thinks writing on the Internet is very easy

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Separate lives, similar dreams
As we know, some children live in the countryside, and some live in the city. Their lives are a little different, but they also have many of the same dreams.
 
In the countryside
In the city
Travel to school
On foot
By bus or car
Classroom facilities（設施）
Recorders and radios.
Multimedia classrooms, VCD, DVD, TVs, recorders, radios, loud-speakers.
Ways of learning
Classes only, without many reference books.
Many extra classes, tutor, lots of reference books.
Eyesight
Less than 45% are near-sighted.
About 75% are near-sighted.
After-class activities
Playing with balls.
English corners and other school clubs.
Homework
Homework can usually be finished at school.
Homework never ends.
Chores to do
Washing, cleaning, farming, looking after younger sisters or brothers, cooking.
Usually no chores.
Family members
Big families with three generations.
Small families with three members.
Ideal jobs
Teachers, drivers, scientists, nurses, secretaries.
Scientists, professors, doctors, computer programmers, managers, university presidents, the UN chief.
小題1: The survey was done among the ______ between in the countryside and the city.
A．teachers.B．students.C．parents.D．a(chǎn)dults.
小題2:. About ______ of children in the countryside have good eyesight, but only ______ of children in the city have good eyesight.
A．45%,75%.B．55%,75%.C．55%,25%.D．45%,25%.
小題3: Which of the following is not included in the survey?
A．Ideal jobs.B．After-class activities.
C．Ways of learning.D．Results of tests.
小題4:. A classroom in the countryside often has ______ according to the survey.
A. records.            B. DVD.               C. TVs.                 D. loud-speakers.
小題5: Which of the following is WRONG according to the survey?
A．Children in the countryside often go to school on foot.
B．Children in the city often have too much homework to do.
C．Children in the countryside often have lots of chores to do.
D．Children in the city are difficult to find ideal jobs.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Botany （植物學） , the study of plants, occupies a particular position in the history of human knowledge．For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest （模糊的）） of insights．It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of pre-industrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient．This is logical．Plants are the basis of the food pyramid for all living things even for other plants．They have always been enormously important to the welfare of people not only for food but also for clothing, tools, medicines, shelter, and a great many other purposes．Tribes living today in the jungle of the Amazon recognize hundreds of plants and know many properties of each．To them, botany has no name and is probably not even recognized as a special branch of "knowledge" at all．
Unfortunately, the more industrialized we become, the farther away we move from direct contact with plants, and the less distinct our knowledge grows．Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose or an apple．When nor Neolithic ancestors, living in the Middle East about 10,000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer fields the next season—the first, great step in a new association of plants and humans was taken．Grains were discovered and from them flowed the wonder of agriculture: cultivated crops．From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild, and the accumulated knowledge of tens of thousands of years of experience with plants in the wild would begin to fade away．
小題1:What does the writer mean when he says "This is logical" in the first paragraph?
A．Human knowledge of plants is well organized and very detailed．
B．It is not surprising that early humans had a detailed knowledge of plants．
C．There is no clear way to determine the extent of our ancestor's knowledge of plant．
D．It is reasonable to assume our ancestors behave much like people in pre-industrial societies．
小題2:According to the passage, general knowledge of botany begun to fade away because ____．
A．people no longer value plants as a useful resource
B．direct contact with a variety of plants has decreased
C．botany is not recognized as a special branch of science
D．research is unable to keep up with the increasing number of plants
小題3:We learn that the first great step toward the practice of agriculture is____．
A．the changing diets of early humans
B．the development of a system of names for plants
C．the invention of agricultural implements （工具） and machinery
D．the discovery of certain grasses that could be harvested and replanted
小題4:Human would depend on the controlled production of a few plants for living with
A．the knowledge of plants
B．the discovery of certain grasses
C．the development of machinery
D．the appearance of agriculture

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

The world is not hungry, but it is thirsty. It seems strange that nearly 3/4 of the earth is covered with water while we say we are short of water. Why? Because about 97% of water on the earth is sea water which we can’t drink or use for watering plants directly. Man can only drink and use the 3% the water that comes from rivers and lakes. And we can’t even use all of that, because some of it has been polluted.
Now more water is needed. The problem is: can we avoid a serious water shortage later on? First, we should all learn how to save water. Secondly, we should find out the ways to reuse it. Scientists have always been making study in this field. Today, in most large cities water is used only once and then runs to the sea or rivers. But it can be used again. Even if every large city reused its water, still there would not be enough. What could people turn to next?
The sea seems to have the best answer. There is a lot of water in the sea. All that needs to be done is to get the salt out of the sea water. This is expensive, but it’s already in use in many parts of the world. Scientists are trying to find a cheaper way of doing it. So you see, if we can find a way out, we’ll be in no danger of drying up.
小題1:The world is thirsty because ___________.
A．3/4 of the earth is covered with water
B．we have enough sea water
C．we haven’t used all the water in rivers and lakes
D．a(chǎn)bout 97% of water on the earth can’t be drunk or used for watering plants directly
小題2:Which of the following is TRUE?
A．3% of drinkable water on the earth is from rivers and lakes.
B．75% of water on the earth is in the sea.
C．97% of the earth is covered with water.
D．3% of water on the earth is sea water.
小題3:From the passage we learn that __________.
A．if every city reuses its water, we’ll be in no danger of drying up
B．man can only drink and use about 25% of water on the earth
C．today in most large cities water is used only once
D．water can be used only once

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

In our life, we have rarely expressed our gratitude to the one who lived those years with us. In fact, we don't have to wait for anniversaries to thank the ones closest to us and the ones so easily overlooked. If I have learned anything about giving thanks, it is this: give it now! While your feeling of appreciation is alive and sincere, act on it. Saying thanks is such an easy way to add to the world's happiness.
Saying thanks not only brightens someone else's world, it brightens yours. If you're feeling left out, unloved or unappreciated, try reaching out to others. It may be just the medicine you need. Of course, there are times when you can't express gratitude immediately. In that case, don't let embarrassment sink you into silence and speak up the first time you have the chance.
Once a young minister, Mark Brian, was sent to a remote parish(教區(qū))of Kwakiutl Indians in British Columbia. The Indians, he had been told, did not have a word for thank you. But Brian soon found that these people had unusual generosity. Instead of saying thanks, it is their custom to return every favor with a favor of their own, and every kindness with an equal or superior kindness. They do their thanks. I wonder if we had no words in our vocabulary for thank you, would we do a better job of communicating our gratitude? Would we be more responsive, more sensitive, more caring?
Thankfulness sets in motion a chain reaction that transforms people all around us－including ourselves. For no one ever misunderstands the melody(旋律)of a grateful heart. Its message is universal; its poems transcend(超越)all earthly barriers; its music touches the heaven.
小題1:Who do we easily forget to express our thanks to according to the writer?
A．Friends not meeting for a long time.B．Former teachers and friends.
C．People we want to get close to.D．Our family members and good friends.
小題2: When we say something for what others do for us, it ______.
A．benefits the people who do something for us
B．is good for both us and people who help us
C．wastes our and our friends' time at the same time
D．does harm to both us and people who help us
小題3:What does the writer mean in the third paragraph?
A．The only way to thank others is to express by your own words.
B．The best way to thank others is to do something for them.
C．We can thank people who help us in various ways.
D．We can thank people who help us in two ways.
小題4:The way to make us feel happy is ______ when we think we ourselves are forgotten in the world.
A．to help and appreciate othersB．to ask others to help us
C．to remind others of our helping themD．to ask someone to help others

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Too many people want others to be their friends, but they don’t give friendship back. That is why some friendships don’t last very long. To have a friend, you must learn to treat your friend the way you want your friend to treat you. Learning to be a good friend means learning three rules: be honest; be generous (寬宏大量的)；be understanding.
Honesty is where a good friendship starts. Friends must be able to trust one another. If you don’t tell the truth, people usually find out. If a friend finds out that you haven’t been honest, you may lose your friend’s trust. Good friends always count on one another to speak and act honestly.
Generosity means sharing and sharing makes a friendship grow. You don’t have to give your lunch money or your clothes, or enjoy, like your hobbies and your interests. Naturally you will want to share your ideas and feelings. These can be very valuable to a friend. They tell your friend what is important to you. By sharing them you help your friend know you better.
Sooner or later everyone needs understanding and help with a problem. Something may go wrong at school. Talking about the problem can make it easier to solve . Turning to a friend can be a first step in solving the problem. So to be a friend you must listen and understand. You must try to put yourself in your friend’s place so you can understand the problem better.
No two friendships are ever exactly alike (相同). But all true friendships have three things in common. If you plan to keep your friendships, you must practice honesty, generosity and understanding.
小題1:Some friendships don’t last very long because       .
A．there are too many people who want to make friends.
B．they don’t know friendship is something serious
C．they receive others’ friendships but never give others friendships
D．they always give other people friendships
小題2:According to the passage , honesty is          .
A．a(chǎn)s important as moneyB．more important than anything else
C．something countableD．the base of a friendship
小題3:Which of the following is NOT true in the passage?
A．A friend who gives you his lunch money is a true friend.
B．Always tell your friend the truth.
C．Discussing your problems with your friend often helps to solve the problem.
D．Sharing your mind with your friend is of great value.
小題4:The best title of this passage is        .
A．A Friend in Need Is a Friend IndeedB．Honesty Is the Best Habit
C．How to Be a FriendD．Three Important Points in Life

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

Learning is natural. It begins as soon as we were born. Our  36  teachers are our families. At home we learn to talk and to  37  and feed ourselves.
Then we go to school. A teacher tells us   38   to learn and how to learn. Many teachers teach us, and we pass many   39  .Then people say we are   40  .
Are you really educated? Let’s think about the real meaning of   41   .Knowing facts does not   42 being able to solve(解決) problems. Solving problems   43   creativity(創(chuàng)造性),not just a good  44  .Some people who don’t know many   45 are good at solving problems.
Henry Ford is a good   46  .He left school at the age of 15. Later when his company could not build cars   47  enough, he solved the problem. He  48  of the assembly line(裝配線).
What does a good teacher do? Does he give students facts to  49  ? Well, yes, we must remember facts. But a good teacher   50  how to find answers. He brings us to the  51  of knowledge so we can drink for ourselves. When we are thirsty, we know where to go.
True learning combines(結(jié)合) intake(輸入) and output. We take information   52 our brains. Then we use it. Think of a   53  —it stores a lot of information, but it can’t think. It only obeys commands. A person  54  only remembers facts hasn’t really learned. Learning takes   55 only when a person can use what he knows.
小題1:
A．firstB．goodC．normalD．helpful
小題2:
A．wearB．put onC．runD．dress
小題3:
A．whatB．whenC．thatD．who
小題4:
A．stationsB．peopleC．pencilsD．exams
小題5:
A．caredB．educatedC．exchangedD．passed
小題6:
A．talkingB．growingC．a(chǎn)nsweringD．learning
小題7:
A．suggestB．sayC．meanD．show
小題8:
A．needs B．isC．bringsD．gets
小題9:
A．wordB．thingC．memoryD．condition
小題10:
A．peopleB．factsC．tonguesD．ways
小題11:
A．learnerB．teacherC．exampleD．driver
小題12:
A．wellB．fastC．beautifulD．cheap
小題13:
A．replaceB．heardC．talkedD．thought
小題14:
A．catch B．understandC．followD．remember
小題15:
A．knowsB．showsC．givesD．compares
小題16:
A．plentyB．pileC．stream（小溪）D．much
小題17:
A．ofB．forC．a(chǎn)boutD．into
小題18:
A．radio B．computerC．recordD．machine
小題19:
A．\B．whoC．whichD．what
小題20:
A．placeB．service C．notesD．time

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

New rules for middle school students came out in March. Middle school is going to use a new way to decide who the top students are. The top students won’t only have high marks. They will also be kids who don’t dye（color）their hair, smoke or drink. The following are some of the new rules.
Tell the truth. Have you ever copied someone else’s work on an exam? Don’t do it again! That’s not something an honest student should do. If you have played computer games for two hours in your room, don’t tell your parents you have done homework.
Do more at school. Good students love animals and care for other people. April is Bird-Loving Month in China. Is your school doing anything to celebrate? You should join! That way, you can learn more about animals and how to protect them. When more people work together, it makes it more fun for everyone. Have you ever quarreled with your teammates when your basketball team lost? Only working together can make your team stronger. Be friendly to the people you are with. Try to think of others not only yourself.
Be open to new ideas. Have you ever thought that people could live on the moon? Maybe you’ll discover Earth II someday. Don’t look down on new ideas. Everyone’s ideas are important. You should welcome them, because new ideas make life better for everyone.
Protect yourself. Has someone ever taken money from one of your classmates? Don’t let it happen to you. If you have to go home late, you should let your parents know.
Use the Internet carefully. The Internet can be very useful for your studies. But some things on the Internet aren’t for kids, so try to look at Web pages that are good for you. You can use the Web for fun or homework.
66. How did the author construct the passage?
 

小題1:Which of the following persons can be a top student?
A．Tom who dyes his hair has good marks.
B．John is good at study and easy to accept new ideas.
C．Mary is always helping others and never uses the Internet.
D．Jack, a caring boy, likes quarreled with his classmates
小題2:According to the third paragraph, a top student should ______.
A．make the team stronger B．work together with others
C．be a good friend to others D．get on well with others
小題3:The passage tells us how to ______.
A．be top studentsB．do more at school
C．care for othersD．use the Internet
小題4:According to the new rules, a top student should do all the following except ______.
A．tell the truthB．be open to new ideas
C．use the Internet carefullyD．think only other people

查看答案和解析>>

同步練習冊答案