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8.If two scientists at Los Alamos National Laboratory are correct,people will still be driving gasoline powered cars 50years from now,giving out heat-trapping carbon dioxide(二氧化碳)into the atmosphere-and yet that carbon dioxide will not contribute to global warming.
In a proposal by two scientists,vehicle emissions (排放) would no longer contribute to global warming.The scientists,F.Jeffrey Martin and William L.Kubic Jr.,are proposing a concept,which they have named Green Freedom,for removing carbon dioxide from the air and turning it back into gasoline.
The idea is simple.Air would be blown over a liquid solution of potassium carbonate,which would absorb the carbon dioxide.The carbon dioxide would then be put to chemical reactions that would turn it into fuel(燃料):gasoline or jet fuel.
This process could change carbon dioxide from an unwanted,climate-changing pollutant into a vast resource for renewable fuels.The cycle-equal amounts of carbon dioxide produced and removed-would mean that cars,trucks and airplanes using the synthetic (合成的) fuels would no longer be contributing to global warming.
Although they have not yet built a synthetic fuel factory,or even a small model,the scientists say it is all based on existing technology."Everything in the concept has been built,is operating or has a close cousin that is operating."Dr.Martin said.
The Los Alamos proposal does not go against any laws of physics,and other scientists who have independently suggested similar ideas.r.Martin said he and Dr.Kubic had worked out their concept in more detail than former proposals.
There is,however,a major fact that explains why no one has built a carbon-dioxide-to-gasoline factory:it requires a great deal of energy.
According to their analysis,their concept,which would cost about 5billiontobuild,couldproducegasolineatanoperatingcostof1.40a gallon and would turn economically practical when the price at the pump hits $4.60a gallon.
Other scientists said the Los Alamos proposal perhaps looked promising but could not evaluate it fully because the details has not been published."It's definitely worth pursuing,"said Martin I.Hoffert,a professor of physics at New York University."It's not that new an idea.It has a couple of pieces to it that are interesting."
58.What is the concept of Green Freedom?C
A.Removing the emission of carbon dioxide.
B.Reducing the carbon dioxide produced by car driving.
C.Recycling the carbon dioxide into gasoline.
D.Reserving the carbon dioxide for global warming.
59.What is the value of the scientists'proposal?C
A.It increases the productivity of a fuel factory.
B.It decreases the cost of producing gasoline.
C.It reduces the pollution caused by car driving.
D.It promotes a new idea of environmental protection.
60.The underlined part"has a close cousin that is operating"probably means the technology in the   conceptD.
A.has been popular for so long             
B.has been ignored by many people
C.is not appropriate for practice          
D.will be put into practice in the near future 
61.What is the biggest challenge in realizing the concept Green Freedom?B
A.There is no theoretical basis.
B.It is not economically practical.
C.There is no solution to some technical problems.
D.Only a few scientists support the idea.

分析 本文是一篇科教类阅读,主要介绍了科学家提出了将二氧化碳变为汽油的提议并探讨了其可行性.

解答 58-61.CCDB
58题答案:C考查细节推理,根据第二段最后一句…for removing carbon dioxide from the air and turning it back into gasoline…因为除掉空气中的二氧化碳并将其还原为汽油.可知本题答案为C选项.
59题答案:C考查细节推理,根据第四段第一句This process could change carbon dioxide from an unwanted,climate-changing pollutant into a vast resource for renewable fuels.该过程能将不想要的、改变气候的污染物二氧化碳变为一种巨大的可再生资源.故本题答案为C选项.
60.题答案:D考查细节推理,联系前半句Everything in the concept has been built.该概念中的一切都被建立起来了.可知本题答案为D选项.
61.题答案:B考查细节推理,根据倒数第三段There is,however,a major fact that explains why no one has built a carbon-dioxide-to-gasoline factory:it requires a great deal of energy.然而有一个重要的事实--这需要很多的能量,解释了为什么没有人建立一个"二氧化碳--汽油"工厂.可知本题答案为B选项.

点评 本文是一篇科教类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对 性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.

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删除:把多余的词用斜线(\)划掉.
修改:在错的词下画一横线,并在该词下面写出修改后的词.

There is many different signs in public.They tell you what to do or what not to do in a place.Do you know how they exactly mean?For an example,if you go to see a film,you should enter the cinema at the ENTRANCE or leave through the EXIT.You will also find NO SMOKING sings in much cinemas.If you visited a museum,don't take any photos inside the halls.You are not allowed do so.You will find NO PHOTOS signs in many museum.When you drive a car,don't park in a street without a NO PARKING sign.Making sure you understand the signs and you won't get into any trouble.

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科目:高中英语 来源: 题型:阅读理解

16.Suppose you don't need your car today.And suppose,as it happens,that a stranger in your area does need a car.Would you be willing to rent yours out?
Several car-sharing start-ups,including Getaround,RelayRides and JustShareIt,are eager to connect car owners with renters this way.The companies have different rules,but participating
owners receive,generally speaking,about two-thirds of the rental earnings.RelayRides says an owner of a midsize,late-model sedan who rents out a car for 10 hours a week could expect to clear about$3,000 a year.
Peer-to-peer car sharing remains in the trial stage; it can be found in San Francisco and a few other places.It has a long way to go before it becomes the auto equivalent of Airbnb,the surprise success story for peer-to-peer sharing of space in apartments and houses.
Shelby Clark,founder of RelayRides,says potential investors in his company have been concerned that owners will be afraid to hand their car over to strangers.To address that,he points to Airbnb,saying,"Letting people sleep in your living room is much more of a disturbance into your personal space than letting someone use your car."
 All of these companies offer their own insurance coverage for their renters,which are supposed to put owners'minds at ease.But only two states-California and Oregon-have passed laws to clarify that an owner will not suffer any consequences should a car-sharing renter have an accident.
"In all the other states,legal ambiguity remains,"Shelby Clark says."If a renter should be involved in a serious accident in those states,the victim can be expected to go after every party possible,including the car's owner."
Also to remove the worries of car owners,the driving records of renters are checked for recent serious violations.
 
36.What does the underlined word"sedan"in Paragraph 2 probably refer to?A
A.A kind of car
B.An owner of a car.
C.A renting company.
D.A car-sharing renter.
37.Which of the following is true of Airbnb?B
A.It cares little about personal privacy
B.It deals with house-sharing successfully.
C.It is a very popular car-sharing company
D.Its ideas are being tried out in some states.
38.If a car-sharing renter should have an accident in California,the car's ownerB.
A.has to take legal responsibility    
B.will not suffer the consequence
C.is not covered by health insurance  
D.must pay the insurance for the renter
39.According to the text,more car-owners will participate in the service,ifA
A.legal ambiguity is clarified in all the states
B.renters are warned not to violate traffic rules
C.more money is given to participating owners
D.people are aware of the importance of sharing
40.It can be learned from the text that car-sharingD
A.makes no profit                     
B.remains in popularity
C.is against the state law            
D.is a new business model.

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