英语四级阅读冲刺练习
英语四级考试马上就要进入倒计时了，大家准备的怎么样了?下面是小编分享的英语四级阅读冲刺练习，一起来看一下吧。
Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1.
For questions 1-7. mark
Y(for YES) if the statement agrees with the information given in the passage;
N (for NO) if the statement contradicts the information given in the passage;
NG (for NOT GIVEN) if the information is not given in the passage.
For questions 8-10, complete the sentences with the information given in the passage.
A Cooler Planet
Scientists are cooking up solutions based on current technology that they say they could dramatically turn down the heat of global warming over the next 50 years.
Innovations such as cheaper wind power, gas-electric hybrid and gas cards that generate funds for climate-change projects already are available. Introducing them across the nation could put a dent in the growth of greenhouse gases that are warming the planet, scientists say.
The concentration of carbon dioxide--a potent greenhouse gas--is likely to double before the end of the century, the United States says. Scientists say further warming is inevitable as greenhouse gas emissions climb but that the worse effects can still be avoided.
"The question now is not 'whether to adapt?' but 'how to adapt?'" says a 2004 U.N. report on climate change.
The solutions, says experts, must come from action by politicians, business people, scientists and individuals. Over the next century, power could be derived from sources that release less carbon dioxide into the atmosphere such as nuclear fusion, hydrogen fuel cells and more efficient combustion engines(内燃机).
Scientists: Technology already exists
Technology is a crucial component to meeting the challenge of global warming, say climate researchers and policy experts.
"You need technology;" says Elliot Diringer, international strategies director with the Pew Center on Global Climate Change. "There's no question about that. The question is, 'What is the most efficient way to not only generate the technology but get it deployed.'"
The intergovernmental Panel on Climate Change, a U.N. body issuing regular assessments on the climate, says innovation has advanced faster than expected. It estimates technological improvements could reduce greenhouse gas emissions below 2,000 levels within 20 years and avert even more risky levels of such concentrations.
The IPCC has estimated that technological improvements could sometime between 2010 and 2020 reduce greenhouse gas emissions to levels below those in the year 2000.
"We need to move as fast as we can," Diringer says. "The longer we wait to take concerted action, the greater the impact will be... the more it will cost to achieve the reduction."
Technology with the greatest potential to reduce greenhouse gas emissions already exists, says Princeton University scientists Stephen Pacala and Robert Socolow in a 2004 study published in the journal Science.
Improving efficiency and conservations could reduce billions of tons in atmospheric emissions of greenhouse gases each year. Improvements such as efficient engineering, better gas mileage(英里里程) and new fuel sources for vehicle and power plants have the potential to halt growth of emissions by around 2050, according to the study.
"It is important not to become diverted by the possibility of revolutionary technology," the Princeton authors write in Science. "Humanity can solve the carbon and climate problem in the first half of this century simply by increasing we already know how to do."
The scientists picked seven actions that they say could make the climate stable by 2054. They focused on technology already in place that simply needs to be expanded-- a lot.
Cars are an easy target. Each gallon (加仑) of gas burned gives off about 20 pounds of carbon dioxide into the atmosphere, according to the Environmental Protection Agency. That's a lot of carbon for the 2 billion cars that may be on the road in 2054, nearly four times the number today, the authors report.
The Science article suggests that doubling the average fuel efficiency of cars from 30 miles per gallon today to 60, switching to wind-generated hydrogen fuels or halving the annual number of miles traveled per car to 5,000 could reduce carbon dioxide emissions. The savings would provide one-seventh of the total cuts needed to make U.S. emissions stable, the article states.
In addition, scientists are watching plenty of other technologies being developed to make emissions stable.
Carbon storage
Burying carbon dioxide allows fossil fuel companies to continue pumping oil while reducing greenhouse emissions. The United Nations estimates by 2050 it should be possible to store half of the increasing global emissions in underground reservoirs (水库) at reasonable prices.
The U.S. government already has started a test project at a West Virginia coal power plant. The energy company BP sends 1 million tons of carbon dioxide each year beneath the sands of Sahara desert at one of its facilities in Algeria.
These carbon-reducing projects send millions of tons of carbon dioxide gas into underground geologic formations such as gas beds now filled with water, natural gas or oil.
The risks of such techniques include leakage of carbon dioxide from underground reservoirs that may endanger human life and environment. Scientists are studying techniques to find which rock formations permanently store gases such as carbon dioxide.
Renewable energy
Renewable power is a major facet of reducing global warming emissions, according to the United Nations.
Because most renewable energy sources--wind, ocean tides, solar, biomass fuel--emit less carbon dioxide into the atmosphere than they absorb, they do not add to climate change. The share of renewable in the world energy supply accounts for at least 14 percent of the total, the United Nations estimates.
The price of these renewable fuels and technology is plummeting as demand grows and hardware improves. "Green" tariffs, already introduced in some European countries, guarantee premium prices for energy derived from renewable sources.
States such as New York and California also require utilities to generate a fraction of their energy supply from renewable.
Trading carbon
Carbon emissions trading is designed to make global warming prevention affordable, according to the U.N. Convention on Climate Change.
Under the Kyoto Agreement, participating countries agree to emit a certain amount of carbon. If a country cannot afford to meet its carbon emissions limit, it can buy "credits" from a country that has produced less than its allotted amount.
Although critics say there are significant problems under the Kyoto system, the United Nations says emissions trading allows countries gradually to eliminate carbon dioxide while preventing some economic hardships of reducing emissions growth.
Corporate action
Companies also an: devising ways for business and individuals to offset greenhouse emissions. Oregon-based Climate Neutral Network says it soon will offer air travelers access to "Cool Class" air travel in which a portion of airline fares, negotiated through contracts with different companies, are invested in ways to reduce greenhouse emissions.
1. Scientists have found various kinds of methods to solve the problem of global warming.
2. We are not able to prevent the bad effects of the global warming.
3. Politicians, business people as well as scientists and individuals should join together to seek solutions to climate change.
4. It is still in question how to make use of the already existed technology efficiently.
5. The cost to reduce the greenhouse gas emissions is in proportion to the time spent before we take an action.
6. The Environmental Protection Agency states that the number of cars on the road in 2054 is likely to rise three times compared with today's number.
7. The U.S. government has already started a plant in Algeria dealing with the burying of carbon dioxide under the Sahara desert.
8. __________ and _____________ are in potential danger due to the possible risks in the burying of carbon dioxide.
9. According to the United Nations about ________________ of the total world energy supply goes to the renewable energy.
10. Carbon emissions trading can reduce the cost of ____________.
试题详解
1.Y 题干中的关键词solve the problem of global warming(解决全球变暖问题)，是对全文五个方面的归纳概括，所以题目说法正确。
2.N 由题干中的关键词bad effect定位到文章第三段末句：Scientists say further warming is inevitable as greenhouse gas emissions climb but that the worse effects can still be avoided。原文意为：“科学家们认为由于温室气体排放量增加，全球进一步变暖不可避免，但可以避免更坏的影响”。这与题干中“我们不可能避免全球变暖的负面影响”不符.由此得出题目说法错误，
3.Y 由题干中的'关键词solutions定位到文章第五段首句：The solutions，says experts，must come from action by politicians，business people，scientists and individuals，题目是原文的同义替换，题目说法正确。
4.Y 由题干中的关键词make use of the technology(利用技术)定位到小标题Scientists：Technology already exists下的第二段末句：The question is，'What is the most efficient way to not only generate the technology but get it deployed，题目是原文的同义替换，由此得出题目说法正确。
5.Y 由题干中的关键词cost(花费)和time(时间)定位到小标题Scientists：Techno- logy already exists下的第五段：The longer we wait to take conceded action，the greater the impact will be…the more it will cost to achieve the reduction，题目是原文的同义替换，由此得出题目说法正确。
6.N 由题干中的关键词2054定位到小标题Scientists：Technology already exists下的倒数第三段末句：That's a lot of carbon for the 2 billion cars that may be on the road in 2054，nearly four times the number today，the authors report。题目中的“三倍”与原文的“四倍”不符，由此得出题目说法错误。
7.NG 由题干中的关键词U.S，government，Algeria，Sahara desert定位到小标题 Carbon storage下的内容，原文中并未提及在阿尔及利亚开设工厂。
8.Human life，the environment
由题干中的关键词potential danger，burying of carbon dioxide定位到小标题 Carbon storage下面的末段首句：The risks of such techniques include leakage of carbon dioxide from underground reservoirs that may endanger human life and environment，由此得出答案。
9. 14 percent
由题干中的关键词die United Nations，renewable energy定位到小标题 Renewable energy下面第二段末句：The share of renewable in the world energy supply accounts for at least 14 percent of the total，the United Nations estimates，由此得出答案。
10.global warming prevention
由题干中的关键词carbon emissions trading定位到小标题Trading carbon下的首段：Carbon emissions trading is designed to make global warming prevention affordable, according to the UN.Convention on Climate Change，由此得出答案。
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