There is a definite possibility that the climate of the world may be changing. Some scientists imagine that this could even mean the beginning of another ice age. The effects of such a change in climate on the human population of the world would be startling(驚人的).
Recent research suggests that the general warming trend of the past hundred years or so may be coming to an end. During the past ten years, meteorologists tell us the average temperature of the Earth has dropped about one degree Fahrenheit. This does not seem like much, but it could have effects on wind and rain patterns which influence the overall weather picture. If these patterns change a lot, it could mean that certain regions of the world may continue to have long droughts while others will possibly suffer from widespread flooding.
What regulates(調(diào)節(jié))the climate is not exactly known. Meteorologists believe that clouds may be an important factor in regulating the amount of solar heat held by the Earth, which in turn determines the temperature of the planet. Another possibility is that man’s industrial and agricultural methods may be affecting the natural weather patterns. However, the weather is not understood well enough for scientists to say for certain what is happening to the climate and what side effects this will actually have on the world’s population.
小題1:According to the passage, the climate of the world seems to    .
A.be getting colderB.be getting warmer
C.remain the same in the past ten yearsD.have good effects on the world’s population
小題2:Which of the following is TRUE according to the passage?
A.Man’s activities have no effect on the climate.
B.Another ice age will come soon.
C.People don’t care about the changing climate.
D.Scientists are not yet sure about the reason for the changing climate.
小題3:A meteorologist is a person who        .
reads weather forecasts on radio or television 
B. thinks there will be another ice age
C. studies and knows about the weather       
D. believes there will be widespread flooding
小題4: Which of the following may be the factor(s) that affect(s) the natural weather patterns?
A.Clouds.B.The amount of heat the Earth receives.
C.Man’s industrial and agricultural methods.D.All of the above.
小題5:The best title for the passage would be         .
A.Droughts and Floods.B.Meteorologists
C.The Changing ClimateD.Solar Heat

小題1:A小題1:D小題1:C小題1:D小題1:C

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

While all my classmates seem to be crazy about a one-way ticket to Mars, I’d rather say Mars is totally unsuitable for human existence. People won’t have enough food supplies there, and the terrible environment would make it impossible for them to live a long life. Besides, the journey won’t be safe. Can anybody explain to me just why people would go to Mars, never to return?  Steve Minear, UK
Here are the things you can think of: the desire to explore a foreign and unique environment, the excitement of being the first humans to open up a new world, the expectation of fame and glory┅. For scientists there is another reason. Their observations and research will probably lead to great scientific achievements.  Donal Trollop, Canada
There are already too many people on the Earth. I think that something before the end of the century, there will be a human colony on Mars. It will happen when people finally realize that two-way trips to the red planet Mars are unnecessary. Most of the danger of space flight is in the launches and landings. Cutting the trip home would therefore reduce the danger of accidents, save a lot of money, and open the way to building an everlasting human settlement in another world. Enough supplies can be sent on ahead, and every two years more supplies and more people will be sent to the new colony. Mars has all the materials for a colony to produce or make everything it needs, and Mars is far more pleasant than the other planets in the outer space.   Paul Davies, USA
小題1:The main purpose of Steve Minear’s writing is_________.    .
A.to report his classmates’ discussionB.to invite an answer to his question
C.to explain the natural state of MarsD.to show his agreement on going to Mars
小題2:Which of the following best states Donal Trollop’s ideas?  
A.There is a plan to send humans to Mars
B.There are many reasons for going to Mars
C.Scientists become famous by doing research on Mars
D.It is possible to build an Earth-like environment on Mars
小題3: Paul Davies points out that______.  
A.humans need only a one- way ticket to Mars
B.two-way trips to mars will be made safe soon
C.It is easy to reduce the danger and cost of flights to Mars
D.It is cheap to build an everlasting human settlement on Mars
小題4:What does Paul Davies think of human existence on Mars? 
A.Humans will have to bring all they need from the earth
B.Humans will find Mars totally unsuitable for living
C.Humans can produce everything they need
D.Humans can live longer in the colony on Mars

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

閱讀下列短文,從每小題所給的四個(gè)選項(xiàng)(A、B、C和 D)中,選出最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。




A
Book 1 : Brack Obama
Grades: 3-5
Our Price: $ 8.95
His mother came from Kansas. His father came from Kenya. He grew up in Hawaii and Indonesia, far from the center of American politics. Few people had even heard of Brack Obama before 2004. Bt one powerful speech in Boston changed all that for the Illinois senator(參議員). In 2008, this inspiring leader ran for the country’s top job, President.
Book 2: Danica Patrick
Grades:  3-5
Our Price: $ 8.95
Growing up, Danica Patrick dreamed of racing in the Indianapolis 500. In 2005, her dream came true. Danica finished the race in fourth place, the best ever result by a woman. Three years later, she became the first female to win an IndyCar race. As a woman competing in a sport dominated by men, Danica faced many obstacles. But she never stopped believing in herself, no matter what the difficulties.
Book 3: Ellen Ochoa
Grades: 3-5
Our Price: $ 8.95
Some people dream of becoming stars. Ellen Ochoa dreamed of living among them! She worked hard to make her dream of becoming an astronaut come true. On April 8, 1993, she strapped (用帶子系好)herself in for the ride of her life aboard the space shuttle Discovery. Ochoa aimed high and boldly went where no Hispanic woman had gone before. Find out about Ochoa’s amazing journey in her own words and photos from her personal collection!
Book 4: LeBron James
Grades:  3-5
Our Price: $ 8.95
Fans, teammates, and opponents know him as King James. Many people consider LeBron James to be the most talented basketball Player of his generation. But there is much more to his story. He overcame hard times as a kid and rose to national fame as a teenager. He then jumped right from high school to the pros.  Along the way, LeBron never lost sight of where he came from or who he is.
小題1:.
What do the four books have in common according to the passage?
A.Their prices are the same and they are all about famous leaders.
B.They are all about Africans and their contributions to society.
C.They are written for the same grades and their prices are the same.
D.They are for the same readers and printed by the same publisher.
小題2:.
Emma is dreaming of being a car racer. Who can be an example to her?
A.Brack ObamaB. Danica PatrickC.Ellen OchoaD.LeBron James
小題3:.
If John wants to learn something about becoming a basketball player, which book should he read?
A.Brack ObamaB. Danica PatrickC.Ellen OchoaD.LeBron James
小題4:.
Which of the following statements is TRUE according to the passage?
A.Obama was popular with most of the people in America before he ran for president.
B.In 2005, Danica Patrick became the first woman to win an IndyCar race.
C.Ochoa is the first Hispanic woman to have gone aboard the space shuttle Discovery for the ride.
D.LeBron James is the most talented basketball player.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

TOEFL stands for Test of English as a Foreign Language, which assesses the proficiency (熟練) of English language of a person in an academic setting. Various institutions, scholarship programs require this test as a trusted and effective indicator of a person’s ability to communicate in English.

TOEFL is available in CBT----Computer-based Technology, PBT----Paper-based Technology and IBT----Internet-based Test formats(形式)to assess the proficiency of English Language. IBT TOEFL is a four-hour test comprising sections: Reading, Listening, Speaking and Writing. In areas where internet-based test is not available, a paper-based test (PBT) is given. PBT is a three-hour test comprising four sections: Listening, Structure and Written Expression, Reading Comprehension and Writing.
Taking TOEFL test opens many doors to get admission in foreign universities. More than 7500 colleges, universities and agencies in more than 130 countries rely on TOEFL test scores to check proficiency for English Language. It is very convenient to take this test and it is available in 165 countries world wide.
It measures your academic skills that whether you are ready to study or train at under graduate or post graduate level in foreign universities or not. In the test candidates are provided with a passage from text books and questions based on lectures, and you can be asked to speak or write in response related to that passage.
As the test is made up of 100 % academic questions, so many universities consider it the most effective test, while taking any admission. To take TOEFL test you should:
-----Improve your writing skills;
-----Improve your vocabulary;
-----Practice other reading passages on the TOEFL Test;
-----Be familiar with the format of the test;
-----Practice for listening test on the TOEFL test.
To take admission in World’s famous Harvard University, the minimum TOEFL score required is 587 on the paper-based test, 240 on the computer-based test, or 94-95 on the internet-based TOEFL.
小題1:The underlined word “comprising” in Paragraph 2 probably means ________.
A.includingB.formingC.combiningD.explaining
小題2:Which section is Not included in IBT TOEFL?
A.Reading.B.Writing.
C.Speaking.D.Structure and Written Expression.
小題3: According to the passage, many students are required to take TOEFL test probably because the test can________.
A.improve their academic skills
B.indicate their proficiency of English language
C.provide scholarship programs in many countries
D.decide your graduation from foreign universities
小題4:What would be the best title for the passage?
A.Advantages of TOEFL testB.Introduction to TOEFL test
C.Preparations for TOEFL testD.Assessment of TOEFL test

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

There were smiling children all the way. Clearly they knew at what time the train passed their homes and they made it their business to stand along the railway, wave to complete strangers and cheer them up as they rushed towards Penang. Often whole families stood outside their homes and waved and smiled as if those on the trains were their favorite relatives. This is the simple village people of Malaysia. I was moved.
I had always traveled to Malaysia by plane or car, so this was the first time I was on a train. I did not particularly relish the long train journey and had brought along a dozen magazines to read and reread. I looked about the train. There was not one familiar face. I sighed and sat down to read my Economics.
It was not long before the train was across the Causeway and in Malaysia. Johore Baru was just another city like Singapore, so I was tired of looking at the crowds of people as they hurried past. As we went beyond the city, I watched the straight rows of rubber trees and miles and miles of green. Then the first village came into sight. Immediately I came alive; I decided to wave back.
From then on my journey became interesting. I threw my magazines into the waste basket and decided to join in Malaysian life. Then everything came alive. The mountains seemed to speak to me. Even the trees were smiling. I stared at everything as if I was looking at it for the first time.
The day passed fast and I even forgot to have my lunch until I felt hungry. I looked at my watch and was surprised that it was 3:00 pm. Soon the train pulled up at Butterworth. I looked at the people all around me. They all looked beautiful. When my uncle arrived with a smile, I threw my arms around him to give him a warm hug (擁抱). I had never done this before. He seemed surprised and then his weather-beaten face warmed up with a huge smile. We walked arm in arm to his car.
I looked forward to the return journey.
小題1: The author expected the train trip to be________ .
A.a(chǎn)dventurousB.pleasantC.excitingD.dull
小題2: What did the author remember most fondly of her train trip?
A.The friendly country people.B.The mountains along the way.
C.The crowds of people in the streets.D.The simple lunch served on the train.
小題3: Which of the following words can best take the place of the word "relish" in the second paragraph?
A.chooseB.enjoyC.prepare forD.carry on
小題4: Where was the writer going?
A.Johore BaruB.The Causeway.C.ButterworthD.Singapore
小題5: What can we learn from the story?
A.Comfort in traveling by train.B.Pleasure of living in the country.
C.Reading gives people delight.D.Smiles brighten people up.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

The Mystery of the Flashing Fireflies
During summer nights fireflies flash in the darkness. They look like bright spots of light dancing on the breeze. Catching them in a jar for a few minutes can be fun. Fireflies are not really flies, though. They are winged beetles. Scientists are using these special beetles to learn more about our world.
The reason a firefly flashed its light is to find a mate. There are around two thousand species, or kinds, of fireflies. Fireflies mate only with their own species. Each kind of firefly has its own flash pattern. It is important that fireflies recognize this pattern. That way they can find bugs of their own kind. The male firefly flies around in the sky while the female firefly stays close to the ground.
For many years, how a firefly flashes its light was a mystery. Scientists now know that a firefly’s light is a cold light. It gives off all of its power as light. It does not produce heat. A normal light bulb gives off only ten percent of its power as light. The rest of the power is wasted as heat. That is why a light bulb that has been on for a while is very hot. The firefly’s light does not feel hot like a light bulb.
Scientists have also learned that fireflies have a small built-in lantern. This special lantern is located inside a firefly’s body. To create light, a gas flows through tiny tubes. This causes the firefly to light up. A firefly can also turn its light on and off quickly. This puzzled scientists. They learned that short bursts of this gas make the firefly glow. When the gas fades, the light goes out. This process happens very quickly.
Scientists know that what they learn from fireflies will be important. Medical studies using fireflies are helping scientists fight illnesses in human beings. They have made new medicines from the chemicals used by fireflies to make light. Fireflies have also helped with new discoveries. New flashlights and flares have been made based on fireflies. These new flashlights and flares produce a cold light like a firefly. This way all the power makes the light shine. This little bug may be a pleasure to watch, but it is also an important part of our lives.
小題1:Why did the author most likely include Paragraph 4?
A.To explain how fireflies make light.B.To describe different kinds of fireflies.
C.To show how much power fireflies use.D.To describe why fireflies make light.
小題2:Which of these is the best choice for a heading for Paragraph 5?
A.The Cool Light of FirefliesB.Watching Fireflies Flash
C.Understanding the PatternsD.Learning from Fireflies
小題3:According to the passage, a firefly’s light is different from a light bulb’s light because the firefly’s light _______.
A.shines brighterB.does not fadeC.lasts longerD.is not hot
小題4:A reader asks this question about the passage: “ How many different kinds of fireflies are there?” Which paragraph from the passage answers the question?
A.Paragraph 2B.Paragraph 3C.Paragraph 4D.Paragraph 5
小題5:The author most likely wrote this passage in order to __.
A.tell why fireflies light upB.give facts about fireflies
C.show how fireflies help doctorsD.compare a firefly to a light bulb

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Public schools in Washington, D.C. provide students with musical instruments for free. When something goes wrong with an instrument, Charles West and Larry Jernigan do the repairs. Both men approach their work with a passion(激情). For them, it’s important that students have a joyful experience with music.
The two have worked together for almost 20 years. This year alone, they’ve fixed about 450 instruments. Both men are musicians and music lovers, so learning to do repairs came naturally.
“I have been a musician all my life.” says West. “I played in an orchestra here in the city. I majored in music in college. I played in an army band.”
Jernigan’s musical interests are varied. “I was formerly trained in the piano and guitar. The alto sax, and the flute, I picked up while working here.”
In addition to fixing instruments, the two also go to schools to instruct teachers and students on how to make minor repairs on their own.
West believes if children start early and stay involved with music, it enriches other areas of their lives. “I see that in other kids. I see it in myself. I have seen it hundreds of times and it works,” he says. “They learn teamwork. They learn patience and respect.
But West has concerns about the future of music in the electronic age.
“This instant age has taken away from the sit-down, the patience. And to learn to play an instrument, it takes patience, it takes diligence, it takes time.”
Being able to enjoy music on the job is one of the benefits of the job. Both men agree their best rewards are the students’ performances.
小題1: What’s the job of West and Jernigan at school?
A.Teaching music.
B.Writing music.
C.Making musical instruments.
D.Repairing musical instruments.
小題2:They love the job because they can     .
A.earn more moneyB.learn repair skills
C.enjoy musicD.watch performances
小題3: Which of the following is true of the two men?
A.They have fixed 450 instruments in the past 20 years.
B.They can play and repair musical instruments.
C.Jernigan used to play in an army band.
D.West was trained to play the piano.
小題4: According to West, what can people learn from music?
A.Teamwork and patience.B.The value of time.
C.The truth of society.D.Diligence and confidence.
小題5: What is mainly talked about in the text?
A.How to repair musical instruments.
B.Learning experiences of two repairmen.
C.How to prepare a musical performance.
D.The enjoyable job of two music lovers.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Scientists are closely concerned with the structure of buildings and with the quality of building materials. The World health Organization (WHO) observes that the introduction of air conditioning and energy conservation (保護(hù)) measures have been accompanied by growing problems of indoor air quality. Some pollutants arise from insulation (隔音) products, some from moving cars, and others from modern housing materials. As many Europeans spend up to 90% of their lives in buildings, the health effects of the indoor climate are very important.
  Some construction materials, including fiberboard, insulation foams and certain glues for man-made wood floor boards, for example, give out organic products such as formaldehyde (甲醛). Heat and humidity increase the release of formaldehyde and the gas seriously harms the eyes. Paint, lacquer, etc. can also release dangerous gas into indoor air.
  Construction materials can cause serious damage, especially when they contain asbestos(石棉). Asbestos is naturally present in rock formations worldwide. It belongs to a family of mineral substances made up of solid, non-combustible(非易燃品) fiber. These properties make asbestos a highly sought-after construction material. As early as 1931, however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer.
  The land on which a building is sited may also contribute to pollution. Some kinds of granite or similar rocks contain traces of radium. As it breaks down, this naturally radioactive element produces some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms. The better the homes are insulated, the more is the dangerous gas in indoor air. The main effect of this dangerous gas on health is to increase the risk of lung cancer.
小題1:What is the main idea of the passage?
A.Some building materials pollute indoor air.
B.Some factors cause indoor air pollution.
C.Asbestos can cause lung cancer.
D.The land on which houses are built contributes to indoor pollution.
小題2:Why are Europeans particularly concerned with building materials?
A.Lots of building materials there are radioactive.
B.They stay home up to 90% of their lives.
C.They have a high rate of lung cancer.
D.They spend most of their time indoors.
小題3:Why is asbestos a sought-after building material?
A.It is a kind of insulation foam.
B.Asbestos will not give out dangerous gas.
C.This material is not easy to catch fire.
D.It is rarely present in rock formations.
小題4:Why should we be careful about the land on which a building is to be sited?
A.To determine whether the land is firm enough for a building to be sited on.
B.To make sure that the land contains no radioactive material.
C.To make certain that the land releases no formaldehyde or other gases.
D.To check whether it contains any combustible materials.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

The definition of the standard kilogram is almost entirely wrong. Getting that definition right is a challenge that has tried the patience and intelligence of scientists for decades.
Scientists use just seven basic units to define all the other quantities we use — quantities such as speed or electric power. All of those basic units except the kilogram are themselves defined according to natural properties(屬性)that are beyond human control.
For example, the standard second (time) is defined as a specific number of vibration(振動(dòng))of a type of radiation sent out by atoms of a special metal. The standard metre (length), in turn, is defined as the length of the path light travels under certain conditions.
Not so the kilogram. This orphan of the basic unit family is simply the mass of a small platinum-iridium alloy cylinder(鉑—銥合金筒)locked away in a container maintained by the International Bureau of Weights & Measures in Sevres, France, near Paris. Official bodies around the world have copies of the cylinder.
Embarrassingly, the last time the copies were brought to Sevres for a checkup in the 1980s, officials found that some copies had gained about 20 parts per billion in weight compared to the master cylinder since the previous checkup in the 1940s. This implies that the master cylinder itself may be an inconstant standard.
Several efforts in several different countries are under way to redefine the kilogram according to basic physical quantities such as counting the actual number of atoms of a specific substance in a kilogram or the electromagnetic(電磁的)force that balances a kilogram mass against gravity. A project of the latter type at the laboratories in Gaithersburg, Md., hopes eventually to define mass by means of electrical units.
So far, none of these redefinition projects has borne fruit. They require the very accuracy of measurement and control of experimental conditions. The slightest influence — even a tiny change in weather — can ruin results. You’ve got to hand it to scientists who are willing to devote many years to such painstaking — but extremely important — research.
小題1: Compared with other basic units, the kilogram is ____.
A.a(chǎn)s accurate as other basic units
B.not universally accepted in the world
C.not defined according to natural properties
D.defined in the same way as other basic units
小題2:The author introduced the examination of copies of a platinum-iridium alloy cylinder in the 1980s to indicate that ____.
A.the causes of weight changes had been found
B.such kind of checks had been carried out regularly
C.the changes in weight challenged the definition of the kilogram
D.the consequences of such changes were great in research
小題3: According to the passage, to define the weight of mass by means of electrical units ____.
A.is the only way to redefine the kilogram scientifically
B.has been accepted as the only possible redefinition project
C.is not as complicated as people understand
D.has been considered by some scientists as a better approach
小題4: Which of the following cannot be concluded from the passage?
A.Scientists will achieve success in redefining the kilogram in the near future
B.Some scientists are trying to redefine the kilogram according to basic physical quantities.
C.The redefining of the standard kilogram is quite complicated and can be affected by a number of factors.
D.A number of experiments are being carried out to redefine the kilogram.

查看答案和解析>>

同步練習(xí)冊(cè)答案