Move Earth—it’s no science fictionLONDON-Scientists have found an unusual way to

Move Earth—it’s no science fictionLONDON-Scientists have found an unusual way to

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Move Earth—it’s no science fiction
LONDON-Scientists have found an unusual way to prevent our planet from overheating: move it to a cooler spot. All you have to do is send a few comets(彗星)in the direction of Earth, and its orbit will be changed. Our world will then be sent spinning into a safer, colder part of the solar system.
This idea for improving our climate comes from a group of US National Aeronautics and Space Administration(NASA) engineers and American astronomers. They say their plan could add another six billion years to the useful lifetime of our planet—effectively doubling its working life.
The plan put forward by Dr Laughlin, and his colleagues Don Korycansky and Fred Adams
,needs carefully directing a comet or asteroid so that it passes close by our planet and sends some of its gravitational energy to Earth.
“Earth’s orbital speed would increase as a result and we would move to a higher orbit away from the Sun,”Laughlin said.
Engineers would then direct their comet so that it passed close to Jupiter or Saturn. The comet would pick up energy from one of these giant planets. Later its orbit would bring it back to Earth, and the process would be repeated.
In the short term, the plan provides an ideal way to global warming, although the team was actually concerned with a much greater danger. The sun is certain to heat up in about a billion years and so “seriously compromise” our biosphere(生物圈)—by cooking us.
That’s why the group decided to try to save Earth.
The plan has one or two worrying aspects, however. For a start, space engineers would have to be very careful about how they directed their asteroid or comet towards Earth. The smallest miscalculation(误算)in orbit could fire it straight at Earth—with deadly consequences.
There is also the question of the Moon. As the current issue of Scientific American magazine points out, if Earth was pushed out of its current position it is “most likely the Moon would be stripped away from Earth,” it states. This would greatly change our planet’s climate.
1. What makes the scientists plan to move Earth?
A. A few comets are moving to the direction of Earth.
B. Earth’s working life is coming to an end soon.
C. Earth will become too hot for mankind to keep alive.
D. The moon is moving farther and farther away from Earth.
2.If the plan is successful, Earth will have a working life of ______years.
A.12 billion                  B.6 billion                    C.18 billion                  D.24 billion
3.What serious problems might the plan cause according to the passage?
A. The comet might hit Earth and man might lose the moon.
B. Earth might be moved too far away and man might be frozen to death.
C. The comet might hit Jupiter or Saturn and never return to Earth.
D. Earth’s working life might be greatly shortened.
4.What does the underlined word “compromise” mean?
A. provide                    B. benefit             C. share     D. endanger
5.Which of the following best shows how the plan would work?
答案

1----5     CAADA  
解析

本文介绍了由于地球升温,人们想办法拯救地球,把地球移动一下所用的办法及产生的结果.
1. C. 细节题: 由第一句来定:to prevent our planet from over-heating.
2. A 细节题: 由第二自然段第二句来定: could add another 6 billion years to use
3. A 细节题: 由倒数第二段定.
4. D. 推理题: by cooking us 来推断.
5. A. 细节题: 第五自然段中的close 来定.
举一反三

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McGill Comedy Club
Important meeting today. Discussions on putting on Blazing Saddles. Union room 302, 3-4 pm. New members (both actors and nonactors, living and dead) are welcome.
History Students" Association
Prof. Michael Cross of Dalhousie University will be speaking on “Unskilled Labours on Rivers and Canals in Upper Canada, 1820-1850: The Beginnings of Class Struggle,"at 10 am in Leacock 230.
Design Mirror Sale
All types and sizes of design mirrors priced to please. Sale today in Union room 108.
McGill Teaching Assistants" Association
A general meeting, for all the TAs, will be held at 4 pm in Leacock 116.
Women"s Union
Important. General Meeting at 6 pm, Union room 423. Speaker on “Importance of d
eciding basic goals of the Women"s Union".Everyone, old, new and those intere
sted, please attend.
Film Society
Last meeting of the term for all members.All managers are required to be present. 6:00 sharp, Union room 434.
Canadian University Students Overseas
CUSO presents “Guess Who"s Coming to Breakfast" at 7 pm. Newman Centre, 3484 Peel. Find out about CUSO here and overseas. Everyone welcome.
1.Where can you probably find this text?
A. In a school magazine.          B. In a national paper.
C. In a guide book.              D. In a university daily newspaper. 
2.If you are interested in arts, where would you go for a visit?
A. Leacock 116.                   B. Union room 423.
C. Union room 108.                D. Newman Centre, 3484 Peel. 
3.Which of the following is the name of a play?
A. Blazing Saddles.
B. Guess Who"s Coming to Breakfast.
C. Importance of deciding basic goals of the Women"s Union.
D. Unskilled Labours on Rivers and Canals in Upper Canada, 1820-1850. 
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If you dream of going someplace warm to escape the cold winter weather,a trip to a recently discovered planet would certainly warm you right up.The planet,named
OGLE-TR-56b,has temperatures of more than 3,000°F.“This is the hottest planet we know about,”says Dr Dimitar Sasselov,a scientist who led the discovery team.“It is hot enough to have an iron fog and to rain hot iron droplets(细沫).”
The new planet is 30 times farther away than any planet discovered by scientists
before.It is in the Milky Way(银河)but it is not in our solar(太阳的)system.The new planet moves around a star much like our sun,however scientists discovered the planet by using a new planetsearching method called transit technique.They were able to catch sight of the planet when it moved in front of its star,causing the star"s light to dim(变暗).Scientists compare the method to discovering the shadow of a bee flying in front of a searchlight 200 miles away.“We believe the door has been opened wide to go and discover planets like the Earth,”says Sasselov.
1.We can infer from the passage that_________.
A.there is iron on the new planet
B.we could go to the new planet in winter
C.the star could block our view of the new planet
D.scientists are studying the weather
2.The “transit technique”can_____________.
A.help dim the light of a star
B.help scientists with a searchlight
C.help discover a bee on a planet
D.help find a planet moving before its star
3.Which is the best title for the passage?
A.New Planet searching Technique
B.New Distant Discovery
C.Space Searching
D.Dream Planet
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There are three separate sources of danger in supplying energy by nuclear power(原子能).
First, the radioactive material must travel from its place of production to the power station. Although the power stations themselves are strongly built, the containers used for the transport of the materials are not. Normally, only two methods of transport are in use, namely road or rail. Unfortunately, both of these may have an effect on the general public, since they are sure to pass near, or even through, heavily populated areas.
Second, there is the problem of waste. All nuclear power stations produce wastes that in most cases will remain radioactive for thousands of years. It is impossible to make these wastes nonradioactive, and so they must be stored in one of the inconvenient ways that scientists have invented. For example, they may be buried under the ground, or dropped into deserted mines, or sunk in the sea. However, these methods do not solve the problem, since an earthquake could easily break the containers.
Third, there may occur the danger of a leak(泄漏) or an explosion at the power station. As with the other two dangers, this is not very likely, so it does not provide a serious objection to the nuclear program. However, it can happen.Separately, these three types of dangers are not a great cause for worry. Taken together, though, the probability of disaster(灾难) is extremely high.
1.Which of the following is FALSE?
A.It is possible that a leak or an explosion occurs at a power station.
B.It is unusual for radioactive materials to be transported across land.
C.The containers are likely to be broken by an earthquake.
D.Nuclear wastes remain dangerous in most cases for many years. 
2.The author thinks that the ways to store nuclear wastes are ________.
A.easy      B.impossible         C.reasonable        D.ineffective 
3.What do we learn from the last paragraph?
A.The power station is a safe place.
B.The dangers of nuclear energy can be prevented.
C.The general public are strongly against the nuclear program.
By itself, none of the three dangers is very likely to cause much worry.
4.What is this passage about?
A.Uses of nuclear power.          B.Dangers from nuclear power.        
C.Public anger at nuclear power.  D.Accidents caused by nuclear power. 
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If there is no difference in general intelligence(智力)between boys and girls,what can explain girls" poor performance in science and mathematics?
It seems to be that their treatment at school is a direct cause.Mathematics and science are seen as subjects mainly for boys,and therefore ,as girls become tee
nagers,they are less likely to take them.Interestingly,both boys and girls often
regard the subjects for boys as more difficult.Yet it has been suggested that girls do not take mathematics courses ,not because they are difficult,but for social reasons.Girls do not want to be in open competition with boys because they are afraid to appear less feminine(女性的)and attractive.
However,if we examine the performance of boys and girls who have taken mathematics courses,there are still more highachieving boys than there are girls.This difference appears to be worldwide.Biological explanations have been offered for this,but there are other explanations too.
Perhaps the difference which comes out during the teenage years has its roots in much earlier experiences.From their first days in kindergarten,boys are encouraged to work on their own and to complete tasks.Facts show that outstanding(杰出的)mathematicians and scientists have not had teachers who supplied answers.
Besides,there can be little doubt that teachers of mathematics and science expect their boy students to do better at these subjects than their girl students.They even appear to encourage the difference between boys and girls.They spend more time with the boy students ,giving them more time to answer questions and working harder to get correct answers from them.They are more likely to call on boys for answers and to allow them to take the lead in classroom discussion.They also praise boys more frequently.All of this seems to encourage boys to work harder in science and mathematics and to give them confidence(信心)that they are able to succeed.
Such a way of teaching is not likely to encourage girls to take many mathematics
and science courses,nor is it likely to support girls who do.When it comes to these subjects it seems certain that school widens the difference between boys and girls.
1.Girls are likely to think that____________.
A.science courses are for both boys and girls
B.science courses make them more popular
C.science courses make them successful        
D.science courses are difficult for them          
2.The text mainly discusses_____________reasons for the difference between boys and girls in scientific achievements. 
A.biological         B.historical          C.social       D.personal          
3.What are boys usually encouraged to do at school?
A.To get help with their homework.        
B.To play the leading role in class.        
C.To work with girl students in class.        
D.To learn to take care of others.          
4.What does the passage say about great mathematicians?        
A.Their teachers did not supply answers to them.        
B.They started learning mathematics at an earlier age.        
C.They showed mathematical abilities in their teenage years.
D.Their success resulted from their strong interest in mathematics.
5.The author would probably agree that_____________.
A.boys and girls learn in the same way        
B.boys and girls are equal in general intelligence        
C.girls are more confident in themselves than before        
D.girls should take fewer science courses than boys          
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