Question

13．If two scientists at Los Alamos National Laboratory are correct，people will still be driving gasoline powered cars 50 years 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．Dr．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﹩5 billion to build，could produce gasoline at an operating cost of﹩1.40 a gallon and would turn economically practical when the price at the pump hits﹩4.60 a 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．"

62．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．
63．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．
64．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  
65．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．

Answer 1

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 CCDB
58：C 细节理解题，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：C 细节理解题，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：D 词意理解题，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：B 细节推理题，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 阅读理解题测试考生在阅读基础上的逻辑推理能力，要求考生根据文章所述事件的逻辑关系，对未说明的趋势或结局作出合理的推断；或根据作者所阐述的观点理论，对文章未涉及的现象、事例给以解释．考生首先要仔细阅读短文，完整了解信息，准确把握作者观点．