Flying over a desert in an airplane, two scientists looked down with trained eyes at trees and bushes.After an hour’s flight, one of the scientists wrote in his notebook, "Look here for probable metal." Walking across hilly ground, four scientists reported, "This ground should be searched for metals." From an airplane over a hilly wasteland a scientist sent back by radio one word "Uranium".
None of the scientists had X-ray eyes: they had no magic powers for looking down below the earth’s surface.They were merely putting to use one of the newest methods of locating minerals in the ground -- using trees and plants as signs that certain minerals may lie under the ground on which the trees and plants are growing.
This newest method of searching for minerals is based on the fact that minerals deep in the earth may affect the kind of bushes and trees that grow on the surface.
At Watson Bar Creek, a mineral search group gathered bags of tree seeds.Boxes were filled with small branches from the trees.Roots were dug and put into boxes.Each bag and box was carefully marked.In a scientific laboratory the parts of the forest trees were burned to ashes and tested.Each small part was examined to learn whether there were minerals in it.
Study of the roots, branches and seeds showed no silver.But there were small amounts of gold in the roots and a little less gold in the branches and seeds.The seeds growing nearest to the tree trunk had more gold than those growing on the ends of the branches.
If the trees indicated that there was no gold in the ground, the scientists wouldn’t spare money to pay for digging into the ground.
小題1:Scientists were flying over a desert or a hilly wasteland or a mountain region to _____.
A.train their eyesB.study the trees
C.look for goldD.search for minerals
小題2:The study of trees, branches and roots indicated that ______.
A.there were larger amounts of gold in the branches far from the tree trunk than in the seeds
B.there were smaller amounts of gold in the tree roots deep in the ground than in the branches
C.there were larger amounts of gold in the seeds growing closer to the tree trunk than in the seeds farther from it
D.there were larger amounts of gold in the branches than in the leaves on the ends of the branches
小題3:Which of the following is NOT mentioned as part of a tree that can help the searchers?
A.leavesB.rootsC.branchesD.seeds
小題4:Which of the following might be the best title for this passage?
A.Scientists searching for treasure with special equipment.
B.New methods of doing geological study.
C.Gold could be found in trees and plants.
D.A new method of searching for minerals.
小題1:D
小題2:C
小題3:A
小題4:D

小題1:細(xì)節(jié)題,從文章第一段的:This ground should be searched for metals." From an airplane over a hilly wasteland a scientist sent back by radio one word "Uranium".說(shuō)明他們找的是礦物質(zhì)。選D。
小題2:細(xì)節(jié)題,從文章倒數(shù)第二段的:The seeds growing nearest to the tree trunk had more gold than those growing on the ends of the branches.說(shuō)明靠近樹干生長(zhǎng)的種子的金子含量要比離樹干遠(yuǎn)的種子多。選C。
小題3:排除題,從倒數(shù)第三段的句子:At Watson Bar Creek, a mineral search group gathered bags of tree seeds.Boxes were filled with small branches from the trees.Roots were dug and put into boxes.說(shuō)明leaves沒有提到,選A。
小題4:主旨題:從文章第二段They were merely putting to use one of the newest methods of locating minerals in the ground 得出選D。
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


The United States is the world's largest consumer of energy. We use electricity, gas and oil to light and heat our buildings and run our cars. The demand for power is growing. But we may not need to build new power plants or find more oil. The best way to increase our supply of energy is to be more efficient.
Did you know that when you leave your video-game console (游戲機(jī)操縱臺(tái)) on, it consumes more electricity than two refrigerators? Or that those funny-looking, twisty bulbs (燈泡) use 75% less power than traditional light bulbs? We have the tools to save money, reduce pollution and even help our planet, simply by wasting less energy.
As President, Barack Obama plans to make energy efficiency in American a major goal. He has promised to cut 15% of all energy used by the Federal Government. In a speech, he called for 75% of government office buildings to be updated for better efficiency. He pointed out that energy-efficient buildings and homes will save consumers billions of dollars on energy bills. An “extra benefit”, he added, will be “a cleaner, safer planet.”
Gas, coal and oil are called fossil fuels. Fossil fuels have been the world's main source of energy for hundreds of years. But burning them releases dirty gases, which cause pollution.
There are two main ways to save energy. The first is to use more efficient machines. Hybrid cars use less gas. New appliances are designed to use less electricity. Today's refrigerators are three times more efficient than those before 1973. Laptop computers consume much less energy than desktop computers.
The second is to use machines more productively. According to the US Department of Energy, in the average home, 75% of the electricity used to power electronic equipment is standby power (備用電源) . That means power flowing to plugged-in appliances whether or not they are being used.
Homeowners can avoid wasting power by pulling the plug on appliances when they are not in use. Efficiency experts argue that today's best techniques could cut US oil and gas use in half, and reduce our electricity use by three-fourths.
小題1:By referring to Obama's plan, the author mainly intended to say that _______
A.the US government office buildings have wasted the most energy
B.Obama has decided to take the lead to cut down the use of electricity
C.it is time for the US to shoulder the responsibility for a cleaner planet
D.the US is determined to improve energy efficiency in the whole America
小題2:It can be inferred from the text that ________.
A.to build new power plants or find more oil is no longer useful
B.burning fossil fuels can lead to a growing demand for power
C.everyone can make a difference by wasting less energy
D.most of the electricity is wasted with appliances plugged-in
小題3:What would be the best title for the text?
A.The world's largest consumer of energy
B.The world's energy efficiency movement
C.We need to find new energy
D.We have to be more energy efficient

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


Are you a compulsive spender,or do you hold on to your money as long as possible? Are you a bargain hunter? Would you rather use charge accounts than pay in cash? Your answers to these questions will reflect your personality.According to psychologists,our individual money habits not only show our beliefs and values,but can also stem from past problems.
Experts in psychology believe that for many people,money is an important symbol of strength and influence.Husbands who complain about their wives’ spending habits may be afraid that they are losing power in their marriage.Wives,on the other hand,may waste huge amounts of money because they are angry at their husbands.In addition,many people consider money a symbol of love.They spend it on their family and friends to express love,or they buy themselves expensive presents because they need love.
People can be addicted to different things —for example,alcohol,drugs,certain foods,or even television.They are compulsive in their addictions,i.e.they must satisfy these needs to feel comfortable.In the same way,according to psychologists,compulsive spenders must spend money.
For people who buy on credit,furthermore,charge accounts are even more exciting than money:in other words,they feel that with credit,they can do anything.Their pleasures in spending enormous amounts are actually greater than those they get from the things they buy.
There is even a special psychology of bargain hunting.To save money,of course,most people look for sales,low prices,and discounts.Compulsive bargain hunters,however,often buy things that they don’t need just because they are cheap.They want to believe that they are helping their budgets,but they are really playing an exciting game:when they can buy something for less than other people,they feel that they are winning.Most people,experts claim,have two reasons for their behavior:a good reason for the things that they do and the real reason.
It is not only scientists,of course,who understand the psychology of spending habits,but also business people.Stores,companies,and advertisers use psychology to increase business:they consider people’s needs for love,power,or influence,their basic values,their beliefs and opinions, etc.in their advertising and sales methods.
Psychologists often use a method called “behavior therapy(療法)”to help individuals solve their personality problems.In the same way,they can help people who feel that they have problems with money:they give them “assignments” If a person buys something in every store that he enters, for instance,a therapist might teach him self discipline in this way:on the first day of his therapy, he must go into a store,stay five minutes,and then leave.On the second day,he should stay for ten minutes and try something on.On the third day,he stays for fifteen minutes,asks the salesclerk a question,but does not buy anything.Soon he will learn that nothing bad will happen to him if he doesn’t buy anything,and he can solve the problem of his compulsive buying.
小題1:If you use charge accounts,           
A.you pay in cash
B.you pay less than you should
C.you pay with credit card
D.you pay more than you should
小題2:Compulsive bargain hunters buy things for all the following reasons except that         
A.the things they buy are cheap
B.they believe they can balance their budgets
C.they get psychological satisfaction
D.they really need the things they buy
小題3:Behavior therapy in this case aims at         
A.helping businessmen to increase their business
B.helping compulsive spenders to buy less
C.finding out how people will react if they are allowed to buy
D.finding out what people will do in front of a bargain
小題4:The underlined word “those” in Paragraph 3 refers to         
A.different things
B.their addictions
C.their pleasures
D.charge accounts
小題5:From the passage we can conclude that         
A.how you spend money reveals if you are psychologically healthy
B.money is a necessity and will bring you happiness if you have much
C.compulsive buying problems can be solved by taking some medicine
D.a(chǎn)ll businessmen understand well the psychology of customers

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

Imagine the following scenario(情景): A woman buys her lunch every day from a fast food outlet near her job. After some years, she finds herself 30 pounds overweight, and feeling unhealthy. So what does she do? She chooses to bring a lawsuit against the fast food outlet, claiming that the food served there was the cause of her being overweight and in poor health.
Sounds ridiculous, doesn’t? The only thing more absurd than the story itself is the fact that is not fiction. There are people who have sued(控告)fast food chains for causing their weight problems.
This is an example of one of the ways in which many of us spend enormous amounts of energy trying to deny the undeniable and universal fact that we are all ultimately responsible for our own choices and our own lives.
How much easier would we make it for ourselves if we could accept this fact rather than resist it? But how can we embrace the truth, that we are living the lives we choose to live, that we are enjoying or suffering the consequences(結(jié)果) of our own choices, and that blaming others for our problems and shortcomings is nothing more than a comfortable fantasy?
We must acknowledge the truth of our lives, however unpleasant this may be. If we are overweight, in a bad relationship, in a dead end, we need to accept that this is where we are, at this moment in time.
Imagine that woman decided that she was unhappy with the extra pounds she’d gained after many years of eating fast food on a regular basis. Imagine that this woman took the time to really understand and accept that she and no one else was responsible for her eating choices. Having acknowledged this fact, she then decides to make the changes in her lifestyle to become the healthier, slimmer person she wants to be.
小題1:What would be the best title for the passage?
A.Be responsible for Our Own Choices.
B.Overcome the Challenges in Our Life.
C.Acknowledge the Truth Rather than Deny It.
D.More than a Comfortable Fantasy.
小題2: Why is the woman mentioned twice in the passage?
A.To show the right way of dealing with weight problems.
B.To describe a familiar scenario in life.
C.To give support to the author’s viewpoint.
D.To compare the consequences of different choices.
小題3: What can we learn from the first paragraph?
A.Fast food chains contribute little to people’s overweight problems actually.
B.Fast food outlets are responsible for many people to become overweight.
C.Many people tend to blame others for their own problems.
D.The author himself is a supporter of fast food chains.
小題4: What should a person do if he is in a bad relationship with his roommates, according to the author?
A.Acknowledge the truth of his life and let it be.
B.Think about what’s wrong with himself and then put it right.
C.Accept that this is where we are and wait for things to improve.
D.Do whatever he likes regardless of what others think and say.

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 popular college rankings focus primarily on prestige as measured by the SAT scores of incoming students and how many applicants are turned away. An initiative(措施)started last fall by the Obama administration could help families go beyond these limited, and far too easily exploited, indexes to learn quickly and easily how a college is compared with its competitors nationally on important criteria like graduation rates, what a degree actually costs and how much debt a student can expect to run up by graduation day.
If the federal government makes it legally necessary to disclose this information in a clear and consistent(一貫的)way, as it should, families will be better able to make informed college choices. And this will help put pressure on colleges that perform poorly to improve.
Critics may regard this initiative as an example of government overreach. But given that the federal government spends nearly $190 billion a year on higher education aid to students, it has a legitimate interest in making sure that the money flows to the schools that best meet their responsibilities to families and students.
Congress has taken some steps to require greater transparency(透明)from colleges. The 1990 Student Right to Know Act, for example, required colleges and universities that receive federal aid to disclose graduation rates. And the 2008 Higher Education Opportunity Act required schools to offer a way for consumers to determine actual costs after student aid is taken into account.
But many colleges have done a poor job of obeying federal disclosure rules, and much of the available information is not in one place. The administration’s new efforts would enforce reporting requirements and provide some new tools.
President Obama wants to expand campus-based aid to about $10 billion from the current $2.7 billion. He has proposed moving money away from colleges that fail to control tuition increases or provide good value to others that do a better job. That is a worthy idea in principle, but he will need strong data-based evidence to determine how colleges are doing.
The transparency initiatives are a good place to start and should be embraced by both parties in Congress. If students and families, facing higher tuition and rising debt, are to make sound choices, they need more and better information.
小題1:Why did the Obama administration start the initiative last fall?
A.To require colleges to make their graduation rates known to the public.
B.To help colleges perform better in the future.
C.To help parents and students make better choices of colleges.
D.To put more pressure on colleges that are not doing well enough.
小題2:Which of the following statements is TRUE according to the passage?
A.Critics agree that the government should require colleges to obey the disclosure rules.
B.Congress has approved and made the transparency initiatives a law.
C.SAT scores alone do not determine one’s choice of college.
D.Students and families find it very difficult to choose their ideal colleges now.
小題3:A most suitable title for the passage could be______.
A.Congress To Require Greater Transparency
B.What College Parents and Students Need to Know
C.What a Good College Is Measured By
D.Parents and Students Need to Make Wise Choices
小題4:What attitude does the author hold towards the transparency initiative?
A.supportiveB.criticalC.indifferentD.not stated

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

All plant cells are capable of taking up(吸收)water. Even dead ones do to a certain degree. Absorption(吸收)of water by dead cell walls makes wood become larger.
In common land plants, the living cells of roots take upmost of the water. Land plants without roots do exist, however. Those greenish-yellow lichens(苔蘚)you see on rocks in the high mountains have no roots. Half a billion years ago, when water plants started to enter the land, the first land plants did not have roots.
Even among the flowering plants, one finds rootless forms. These flowering plants are “the higher plants” because they evolved(進(jìn)化)recently and are thus considered higher on the evolutionary scale(進(jìn)化度).
In the Peruvian desert, there grows one of these rootless higher plants, a bromeliad. It is a relative of the pineapple. Even if this plant had roots, they would be of no use, because where the plant grows, it never rains. The plant gets its water only from the dew(露水)it collects at night, when its leaves cool off. Such rootless plants, of course, can be moved with ease, but they will only grow when they are placed out in the open. If they are placed too near a house, the radiation from the heat of the house prevents the leaves from cooling and so prevents dew from forming, and the plant dies.
In the southern United States and in Puerto Rico, one sees bromeliads growing high above the streets on the insulation(絕緣物)of electric wires. These plants get their water from rain, and the only soil they ever come in contact with is the dust that may blow on their leaves.
小題1:Wood becomes larger because of       .
A.dead cell wallsB.water entering dead cells
C.the growth of cellsD.the death of cells
小題2:From the passage we know that the evolutionary scale is graded according to      .
A.evolutionary cyclesB.heights and depths
C.timeD.kinds
小題3:The “bromeliad” is a plant that     .
A.has no rootsB.is a pineapple
C.can grow anywhereD.takes up water through its leaves
小題4:The most suitable title for this passage is “      ”.
A.Absorption of water by plantsB.Rootless plants in America
C.Plants in the desertD.Higher plants

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

In the 1960s Professor Bolin predicted that the “greenhouse effect”, caused by an increase in the amount of carbon dioxide (CO2) in the atmosphere, would lead to important changes in the Earth’s climate. At the time his prediction were regarded as science fiction. But it is now gradually agreed that the amount of carbon dioxide in the atmosphere will double from 0.03% to 0.06% in the next 50 years and that temperatures worldwide will rise by 2°Celsius.
Although a temperature rise of 2°may not seem significant, the local effects may be much greater: in polar regions a rise of 10°by 2025 is expected and in Northern Europe a rise of 4°. Indeed the first effects were expected to be felt before the end of the 20th century,
But how does the “greenhouse effect”operate and why should such a tiny proportion(比例)of CO2 have such a harmful effect? When living creatures breathe out or when things are burned, CO2 enters the atmosphere. Until recently all of this was absorbed by plants, which converted it back into oxygen.
However, the balance of nature has been disturbed. In power stations, in factories and in our cars, we are burning more and more fossil fuels( coal, oil and natural gas ) and this produces huge quantities of CO2---18 billion tons of it enter the atmosphere every year. Added to this, the destruction of forests means that less CO2 can be converted into oxygen by plants. So, the amount of CO2 in the atmosphere is increasing every year.
小題1:Which of the following statements is true according to the passage?
A.Professor Bolin’s predictions were taken seriously in the first place
B.Only a small portion of the atmosphere consists of carbon dioxide
C.No changes in climate will become noticeable for 50 years or more
D.The rise in temperature will probably be 2 degrees in every part of the world.
小題2:The amount of CO2 in the atmosphere is increasing every year because       .
A.Carbon dioxide is produced when we breathe
B.Carbon dioxide is produced when we burn things
C.More forests are destroyed and more fossil fuels are burned
D.The global temperature keeps rising
小題3:The “greenhouse effect”refers to         
A.the problem of the rising global temperature
B.the problem of increasing population worldwide
C.the problem of decreasing population worldwide
D.the problem of air pollution
小題4:The underlined word“operate”in the third paragraph most probably means“      ”.
A.playB.moveC.manageD.function

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

?New York State has passed the USA’s first state law banning motorists talking on hand-held cell phones. The ban will begin November 1st, although drivers caught using hand-held cell phones will be given only warnings during the first month. 
First-time violators(違法者)will face a $100 fine. A second time call for a $200 fine and every violation after that will cost$500. 
At least a dozen localities(地方)have established bans, starting in 1999; and 40 states have had bans proposed but not passed. At least 23 countries, including the Great Britain, Italy, Israel and Japan, ban drivers from using hand-held cell phones. 
There are about 115 million cell phones in use in the United States and more than 6 million in New York State. 
“To think that I’m not going to use cell phone when at the same time I can still use my laptop(膝上電腦), I still can read a paper, I can still change my trousers while driving 65 mph. I think there’s just something wrong,” an official said. 
Other critics noted that other things like eating, drinking coffee and applying make up while driving caused at least as much of a concern. They suggested that the ban include a broader range of things. 
小題1: How much fine will a hand-held cell phone user receive if he has been caught using it four times while driving after November?
A.$500.B.$1000.C.$1200.D.$1300.
小題2:. We can see from this passage that ____. 
A.the ban has been put into effect in most states in the U. S.
B.many of the developed countries forbid drivers using hand-held cell phones
C.over fifty localities or states ban drivers from using hand-held cell phones
D.more people in the U. S. are against the ban than for it
小題3:The official mentioned in this passage ____. 
A.does not agree with this ban
B.doesn’t believe using hand-held cell phones while driving will cause any danger
C.doesn’t understand why hand-held cell phones alone should be banned among many others
D.believes changing pants while driving will cause greater danger
小題4:The writer intends to tell us in the last paragraph that ______. 
A.it is not fair to have this ban passed
B.the ban will never be passed in the whole country
C.more activities of the same kind should also be banned
D.the ban will meet with more criticism

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:完形填空

Robert was a life insurance(人壽保險(xiǎn)) salesman. Try 36 he might, he was still unable to get a couple to sign up for a policy(保單). “I certainly don’t want to frighten you into a 37,” he announced, standing up to 38. “Please sleep on it tonight, and 39 you wake up in the morning, let me know what you think.”
People can be motivated by many different 40. Fear is the common one. 41 many people find that other kinds of motivation are usually 42 effective in getting more out of those with whom we live and work.
A twelve-year-old girl took her younger brother, who 43 from a mental disability, Christmas shopping. As they went into a department store, the 44 accidentally hit a display, knocking shoes in every 45. at that 46 a(n) angry clerk grabbed the boy by the arm and 47, “Pick them up.”
“No,” the boy screamed in defiance(反抗).
“Pick them up,” the clerk 48.
“No,” the boy shouted back.
His older sister began picking up the 49. Then the boy started to 50. Before long, the boy, his sister and the clerk were 51 together to put the shoes back in 52.
When they finished, the girl taught the clerk a(n) 53 lesson with these words: “You have to encourage my brother to do it in action.”
If you live or work with other people, you may benefit from the older sister’s advice. If you want people to respond to you, try encouraging them in action. People prefer 54. When you fill people with what they want, you’re 55 to get what you want out of them.
小題1:
A.howeverB.a(chǎn)s C.sinceD.in spite of
小題2:
A.troubleB.saleC.bargainD.decision
小題3:
A.defendB.fight C.leaveD.a(chǎn)rgue
小題4:
A.shouldB.willC.shallD.may
小題5:
A.feelingsB.plansC.meansD.results
小題6:
A.Thus B.But C.PlusD.Since
小題7:
A.less B.more C.half D.just
小題8:
A.a(chǎn)roseB.contributed C.benefited D.suffered
小題9:
A.boyB.girl C.clerkD.salesman
小題10:A. section B. direction       C. shelf             D. course
小題11:
A.occasionB.stage C.situation D.point
小題12:
A.demandedB.conflictedC.reminded D.a(chǎn)rranged
小題13:
A.expectedB.commentedC.shouted D.a(chǎn)cquired
小題14:
A.shoesB.books C.toys D.bottles
小題15:
A.cryB.help C.complain D.worry
小題16:
A.walkingB.organizing C.working D.a(chǎn)ssisting
小題17:
A.processB.silenceC.detail D.order
小題18:
A.thoughtfulB.instantC.cautiousD.complex
小題19:
A.giftB.stickC.honey D.tears
小題20:
A.positiveB.likelyC.confidentD.probable

查看答案和解析>>

同步練習(xí)冊(cè)答案