LONDON: What could possibly be wrong with planting trees? The benefits are obvio

LONDON: What could possibly be wrong with planting trees? The benefits are obvio

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LONDON: What could possibly be wrong with planting trees? The benefits are obvious; they  firm the soil, soak up (摄取) extra water and take carbon dioxide (二氧化碳) out of the atmosphere.
However, it now turns out that planting trees could add to global warming.
Tree roots do a great job of keeping soil firmly on the ground and out of the wind’s power. The problem is that some of those dust clouds play an important part in taking in carbon dioxide.
Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface. The dust fuels oceanic life.
Dust from China is carried east and left in the Pacific Ocean. If a tree-planting programme there is successful and the dust supply reduced, the final result may be that less carbon dioxide gets locked away in the ocean.
Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work “shows clearly the complexity of the system and the importance of not tinkering(粗劣地修补) with it without understanding the results. For this reason the need is to focus(集中) on cutting carbon dioxide giving off rather than monkeying (瞎弄) about with the land surface.”
An American scientist, Robert Jackson, has shown that when native grassland areas are invaded(侵入) by trees, carbon is lost from the soil. “We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees, ” says Jackson.
In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed(超过) by the loss of carbon from the soil below ground. Countries that plan to combat global warming by planting trees may have to think again.
Solutions to environmental problems are often more complex than they first appear, and understanding the Earth’s climate is a very great challenge.
小题1:People usually hold the opinion that_____________.
A.huge dust storms can destroy carbon dioxide
B.huge dust storms can destroy the oceans on the earth
C.huge dust storms can’t do anything beneficial for man
D.planting trees is the only way to control huge dust storms
小题2: Andy Ridgwell, the environmental scientist, believes that_____________.
A.dust plays a more important part than trees
B.trees shouldn’t have been planted in dry places
C.carbon dioxide is harmful to everything on the earth
D.environmental problems are more complex than expected
小题3: Robert Jackson’s experiment proves that_____________.
A.grassland areas should be covered by forests
B.trees hold more carbon than grasses
C.carbon can turn grass into dust
D.less carbon can make trees grow faster

答案

小题1:C
小题1:D
小题1:B
解析

小题1:根据短文第四五段描述,可知作者认为沙尘暴对人类一点好处都没有,故选C
小题1:根据第六段says his work “shows clearly the complexity of the system and the importance of not tinkering(粗劣地修补) with it without understanding the results.描述,可知环境问题比预期的要复杂的多.故选D
小题1:根据倒数第二段“We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees, ”描述,可知树木能比草吸收更多的碳素.故选B
举一反三
Knowing about yourself not only means finding out what you’re good at and what you like,but also means discovering what you’re not good at and what you don’t like.Both help you to see your aim in life.
Although most students would be unhappy if they failed a very difficult physics examination,they have in fact learned a lot about themselves.They know that they should not become engineers or physical scientists.So failing can help a student to live a happier life if he  learns something from it.They may then decide on their aims and choose the work they like and are fit for.
It is impossible to decide whether you like something until you have tried it.If you decide to play the piano,you need to take more than one lesson before knowing whether you are really interested in it or able to do well.It is not enough if you want to be a great pianist.You also have to like the hard practice and long training.If you enjoy being a great pianist but hate the work,forget it.
It’s a good plan to try as many ideas as possible when you are young.Then you will find out what your true interests are.
小题1:If you say you really know yourself,        
A.you know what you don’t like
B.you know what you are good at
C.you have no interest in your work
D.you’ve got the whole picture of yourself
小题2:Failing can turn into something good      
A.if you have aim in lifeB.if your decision is fight
C.if you lead a happier life D.if you learn something from it
小题3:What can we learn from the second paragraph?
A.Failure is a better mirror
B.Success is more helpful
C.No one is fit for the job of a physical scientist
D.Physics can help students live a better life

题型:不详难度:| 查看答案
Many Chinese students who have learnt English for more than ten years are still unable to speak English very well when they meet a foreigner. They seem to have mastered the basic language structure(结构), but a conversation in English will make them feel uneasy. They are afraid that other people might find out their mistakes.
It"s uncommon that many students who are bad speakers of English can write English perfectly. This proves that they are unable to organize their idea in English. The center of the problem is that they lack practice and confidence (自信).
Why should you be afraid? Do you fear those foreigners with whom you are speaking? Don"t be shy, they will not laugh at you just for a little mistake you make. The best way to get rid of trouble is to learn to speak by speaking more. I am sure that constant practice will help you succeed.
小题1:What"s the best topic for the passage?
A.How to Speak to ForeignersB.How to Study English Well
C.How to Organize the Idea in EnglishD.Practice Speaking English All the Time
小题2: Many Chinese students can write English very well, but they cannot speak English fluently because _______________.
A.they seldom meet foreigners
B.they seldom practice speaking English
C.they had no chance to speak English
D.they think it"s enough to master the basic language structure only
小题3:So many Chinese students are afraid to speak to foreigners because __.
A.they are afraid they can"t understand foreigners
B.they don"t think their English is poor
C.they worry about making mistakes in their speaking
D.they didn"t like speaking to foreigners
小题4:According to the passage, which of the following is NOT true?
A.We can speak English fluently by doing more speaking.
B.If you can write English perfectly, you are able to organize your idea in English.
C.If you can write good English composition, you can speak English very well.
D.Any Chinese students can"t speak English fluently because they are afraid of making mistakes.
小题5:In the last paragraph, the expression "get rid of" means_______.  
A.throw awayB.free oneself fromC.give upD.do with

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When the six very best students from different cities in Guangdong Province all together chose universities in Hong Kong ; when the very best students of Beijing picked up HK University while giving up the nearby Peking or Tsinghua University ; when the highest enrollment(录取) rate of Hong Kong Science and Industry University reached 48:1, it’s the high time to ask where the real education heaven for students in China is.
Years ago, the answer certainly would be “Peking or Tsinghua University”. But now no one could give the exact answer without hesitation . The only sure thing is that HK universities have gradually showed an unusual attraction to a great many mainland students.
There’s no doubt to call this HK craze (狂热), which is even out of the expectation of those HK universities themselves.
How can HK universities shake the steady foundations of Peking and Tsinghua University and attract so many mainland students?
First, Hong Kong universities offer large-amount scholarship, especially for the top students who can receive the scholarship as much as 400,000 HK dollars. Since higher education has become a kind of heavy burden of many families, it’s easy to understand why the reaction to the generous offering of HK universities is great.
Second, most HK universities receive professors and students from all over the world and carry out bilingual (双语) education. This kind of excellent language atmosphere is another attraction for mainland students.
Furthermore, university students in Hong Kong have a better chance to study abroad as exchange students.
Can mainland top universities like Peking or Tsinghua University be calm as before when facing the unexpected competition from HK? Will they take relevant measures to win back the top students who once help them set the worldwide reputation? Time will explain it .
The fierce competition brought by HK universities can be a good thing for an entire improvement of education in China. After the awakening and action-taking of mainland universities , they can perform better together with HK universities.
At least, it reminded the mainland universities the tuition fees (学费) are among students’ top concern when they are choosing universities . It’s time to move.
小题1:What is the passage mainly talking about?
A.Some thoughts brought by the enrollment of HK universities.
B.Higher education in Hong Kong.
C.The competition between HK University and Beijing University.
D.The fall of mainland universities.
小题2:Top students from mainland apply for HK universities because________.
A.many students now would love to study abroad to get a better experience
B.they concern only about the tuition fees when choosing universities
C.HK Universities offer higher scholarship, better environment and more opportunities for their further study
D.Beijing University has lost its worldwide reputation
小题3:   From the passage we can see HK universities________.
A.didn’t mean to enroll top students from mainland
B.didn’t expect their enrollment of mainland students would be so popular
C.have strict enrollment rules and only 1 out of 48 students can get the chance to study there
D.are proud of their teaching staff and facilities.
小题4:What does the author mean by saying “It’s time to move .” in the last paragraph ?
A.Mainland universities should take measures as soon as possible to attract students.
B.The opportunities come for top students to study abroad .
C.Mainland universities should make full preparations to enroll Hong Kong students .
D.Top students should be offered further education free of charge .

题型:不详难度:| 查看答案
If your cellphone suddenly stops working, don’t blame the service provider.The malfunction(故障) might well have been caused by something bigger -- a solar storm.Experts expect that Earth will see more solar activity in the near future.The malfunction of electronic devices will just one of the effects.
Sunspots(太阳黑子) serve as an indicator of the sun’s activity.For the past two years, sunspots have mostly been missing.Their absence, the most prolonged in nearly 100 years, has taken even seasoned sun watchers by surprise.
When the number of sunspots drops at the end of each 11-year cycle, solar storms die down and all become much calmer. This “solar minimum” doesn’t last long. Within a year, sunspots and solar storms begin to build toward a new crescendo, the next solar maximum.
What’s special about this latest cycle is that the sun is having trouble starting the next solar cycle. The sun began to calm down in late 2007, so no one expected many sunspots in 2008. They should return in 2010. Scientists have predicted that the next solar cycle could be the most active on record: more sunspots and more solar storms. However, sunspots are mostly missing now.
Since the earth is in close contact with the sun, strong solar activities can bring trouble to our life. People of the 21st century rely on high-tech systems for the basics of daily life. Air travel and radio communications can be affected by strong solar activities. A big solar storm could cause 20 times more economic damage than Hurricane Katrina.
What the sun will do next is beyond our ability to predict. Most astronomers think that the solar cycle will go on but at low level. However, there is also evidence that the sun is losing its ability to produce sunspots. By 2015, they could be gone altogether.
小题1:The sun watcher feel surprised at            .
A.the longest sunspots’ absenceB.the largest sunspot number
C.the malfunction of electronic devicesD.the serious damage by sunspots
小题2:What does the underlined word “crescendo” in paragraph 3 most probably mean?
A.small number B.high level
C.usual cycleD.fresh start
小题3:We can infer that in the past two years         .
A.solar activities have brought much trouble to our life
B.the number of sunspots has increased to a large extent
C.the solar minimum took the place of the solar maximum
D.our cellphones have seldom been interrupted by the solar storm
小题4:Which statement does the text lead you to believe?
A.Solar activities do no harm to our daily life.
B.Hurricane Katrina is also a type of solar storms.
C.It’s difficult to predict sunspots.
D.From now on there’ re no sunspots.
小题5:What is the passage mainly about?
A.The earth is in close contact with the sun.
B.Sunspots can cause trouble to our life.
C.Introduction of sunspots.
D.Introduction of the solar storm.

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Most worthwhile careers require some kind of specialized training. Ideally, therefore, the choice
of an __36__ should be made even before choice of a curriculum in high school. Actually, __37__, most people make several job choices during their working lives, __38__ because of economic and industrial changes and partly to improve __39__ position. The "one perfect job" does not exist. Young people should __40__ enter into a broad flexible training program that will __41__ them for a field of work rather than for a single __42__ .
Unfortunately many young people have to make career plans __43__ benefit of help from a competent vocational counselor or psychologist. Knowing __44__ about the occupational world, or themselves for that matter, they choose their lifework on a hit-or-miss __45__. Some drift from job to job. Others __46__ to work in which they are unhappy and for which they are not fitted.
One common mistake is choosing an occupation for __47__ real or imagined prestige (声望).
Too many high-school students - or their parents for them - choose the professional field, __48__ both the relatively small percentage of workers in the professions and the extremely high educational and personal __49__. The imagined or real prestige of a profession or a White-collar job is __50__ good reason for choosing it as life’s work. __51__, these occupations are not always well paid. Since a large percentage of jobs are in mechanical and manual work, the __52__ of young people should give serious __53__ to these fields.
Before making an occupational choice, a person should have a general idea of what he wants __54__ life and how hard he is willing to work to get it. Some people desire social prestige, others intellectual satisfaction. Some want security; others are willing to take __55__ for financial gain. Each occupational choice has its demands as well as its rewards.
小题1:
A.identificationB.accommodationC.occupation D.entertainment
小题2:
A.thereby B.however C.though D.therefore
小题3:
A.thoroughly B.mainly C.entirelyD.partly
小题4:
A.its B.his C.theirD.our
小题5:
A.thereforeB.since C.furthermoreD.forever
小题6:
A.fit B.makeC.take D.leave
小题7:
A.meansB.jobC.wayD.company
小题8:
A.to B.forC.withD.without
小题9:
A.littleB.fewC.much D.a lot
小题10:
A.chance B.purposeC.basisD.opportunity
小题11:
A.apply B.appeal C.turnD.stick
小题12:
A.itsB.theirC.your D.our
小题13:
A.concerning B.following C.ignoringD.considering
小题14:
A.preferences B.requirements C.tendencies D.ambitions
小题15:
A.a B.any C.theD.no
小题16:
A.ThereforeB.Moreover C.NeverthelessD.However
小题17:
A.majority B.mass C.minority D.number
小题18:
A.proposalB.suggestion C.approvalD.consideration
小题19:
A.towards B.out ofC.againstD.without
小题20:
A.turns B.partsC.risksD.choices

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