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Alternative sources of protein must be found when meat and fish are not available.
A．New
B．Less expensive
C．More
D．Other
答案
更多“Alternative sources of protein must be found when meat and fish are not available.A．NewB．L”相关的问题
第1题
A．Y
B．N
C．NG
第2题
A．Y
B．N
C．NG
第3题
The funds to expand alternative energy research are 2,700 million dollars, a 53 percent increase over the 2006 funding level.
A．正确
B．错误
第4题
Alternative Energy Sources (可替代资源)
When considering alternative energy sources to replace fossil fuels, it should be pointed out that our present technology is dependent on fossil-based energy in two main forms:electricity produced by burning coal, and portable chemical fuels such as petroleum or natural gas．At present not all countries are totally dependent on coal for electricity generation．For instance, nuclear power provided about 48% of the total energy requirements of Finland, France and Sweden in 1996．To a lesser extent, hydroelectric power (水力发电)is also providing electricity to many areas throughout the world．Despite their environmental problems, these alternatives are likely to supply our electricity requirements for at least the first ten years of the new century．However, many scientists are convinced that other less controversial alternatives such as solar and wind power, which convert heat or me-
chanical energy directly into electricity, will provide a "clean" energy for future generations early in the new century.
In most industrialized nations, electricity supplies only a portion of the country's total energy needs, typically about 16%～25%．By far the largest share of a nation's total energy consumption is derived from chemical fuels which are either used for space heating or converted directly into mechanical energy in, for instance, an automobile engine．The great advantage of chemical fuels is their ease of transportation, storage'and utility in even the remotest areas．By contrast, electricity must be constantly generated since it is con sumed essentially the instant it is produced．It is therefore not surprising that recent scientific research has centered on developing a portable chemical fuel to replace fossil fuels.
In addition to economic and environmental considerations, an alternative synthetic chemical fuel should, ideally, be produced from accessible raw materials that are not derived from fossil fuels．Thus, coal liquefaction (液化) cannot be considered as a satisfactory long-term solution．The production of biologicallyderived chemical fuels such as alcohol, produced from the ferment (发酵) of farm crops or from waste products; has also generated a lot of scientific and public interest．However, while these.biological fuels are less polluting than fossil fuels, they are still carbon-based molecules which, during the process of burning are less polluting than fossil fuels, send carbon dioxide (二氧化碳) and other pollutants (污染物) into the environment．Clearly, the only ideal long-term replacement for fuels such as petroleum is one that contains no carbon．Obviously, hydrogen meets this requirement.
第 36 题 The phrase "these alternatives" (in Line 8 of Paragraph 1) refers to____.
A．solar and wind power
B．oil and coal
C．nuclear and hydroelectric power
D．petroleum and natural gas
第5题
Finding the resources to meet this demand in a 【S2】________, sustainable way is the cornerstone of our nation’s energy security, and will be one of the major 【S3】________ of the 21st century. Alternative forms of energy --- bio-fuels, wind and solar, to name a few --- are 【S4】________ being funded and developed, and will play a growing 【S5】________ in the world’s energy supply. But experts say that, even when 【S6】________, alternative energy sources will likely meet only about 30% of the world’s energy needs by 2050.
For example, even with 【S7】________ investments, such as the $93 million for wind energy development 【S8】________ in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio-fuels 【S9】________ only about 1% of the market today. Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of 【S10】________ --- both traditional and alternative.
A stable B solutions C significant D role E progress
F marvelous G included H growth I exactly J consist
K comprise L competitions M combined N challenges O certainly
【S1】
【S2】
【S3】
【S4】
【S5】
【S6】
【S7】
【S8】
【S9】
【S10】
请帮忙给出每个问题的正确答案和分析，谢谢！
第6题
Development and the Protection of Environment
Modern technology has developed in a manner which often conflicts with the environment. The many industrial pollutants constantly impact the environment in a harmful way. Nevertheless, it is possible and practical to achieve a high level of technology, with- out altering the overall natural environment.
There are two basic methods of conserving the natural environment. One is alternative technology in which techniques (such as windmills and solar energy) must be found for providing power. The other is to try to minimize the, effects of modern technology by the more efficient: use of materials and more, effective pollution control.There comes a point when the quality of life can no longer be, improved because of the high population density and the largely unsuccessful attempts to meet its demands.
Present energy policies of the western world are considering new energy sources to meet the demands of a growing population. The main Sources used have been oil, gas, and coal-which are in limited supply-- and nuclear power, which has problems concerning radioactive waste storage. Wind and solar energy are alternative possibilities, but only solar energy is likely to become a main power source for many countries.
Many of the materials used daily in a technological society are destined to be discarded, Rags, paper, metal, glass, and plastics are all substances that could be recycled or reuseD．Research is being done to determine methods of separating useful products from industrial and domestic waste.
The processing of sewage is also helpful. This is collected in gasholders and burned to produce heat and create electricity. The waste itself is often used for soil enrichment.
第 41 题 Modern technology is harmful to the natural environment mainly because
A．of industrial pollutants
B．it has become too expensive
C．it has become too complicated
D．it consumes all natural resources
第7题
Time is running out if the deadline is to be met. And this has brought individual political blocs closer to agreement among themselves on a number of the outstanding issues. But sources close to the discussion say the question of the actual distribution of resources, particularly the lucrative revenue from oil between the country's regions, remains contentious at this point, and it bears on the whole issue of federalism which has been the biggest sticking point throughout this past week of negotiations. So not only this trading continue between the parties in the present government, but a broader consensus on the constitution has yet to be achieved before the document is put to parliament. The alternative is a partial deal that some say would be realistic, others futile.
Iraqi political leaders are bargaining to reach an agreement on ______.
A．the country's new constitution
B．the fate of Saddam Hussein
C．American withdrawal from Iraq
D．the country's new capital
第8题
听力原文：W: Everyone seems to be talking about climate change these days!
M: I'm not surprised. It's all these greenhouse gases--that's what's causing the problem!
W: What are the greenhouse gases？
M: You know, carbon dioxide, which comes mainly from the burning of fossil fuels, such as oil, gas and coal.
W: I've never understood why that's a problem.
M: Evidently these gases build up in the earth's atmosphere, and trap the heat from the sun.
W: And so this heat is warming the planet？
M: Exactly!
W: Well, isn't that good news？ I hate these cold winters we get!
M: Yes. But what's good for you here may not be so good for people elsewhere in the world. For the average world temperatures could rise. That can have a huge effect on local climates and ecosystems around the world,
W: So you really think that these floods we've seen m the news could be caused by global warming？
M: Sure! And also the droughts and the storms.
W: So what can we do about it？
M: It's not realistic to stop using fossil fuels today. But we can start trying to reduce carbon dioxide emissions.
W: And look for alternative sources of energy too, of course!
(1)
A．Droughts.
B．Floods.
C．Fossil fuels.
D．Global warming.
第9题
请根据短文内容，回答题。
Energy and Public Lands
The United States boasts substantial energy resources. Federal lands provide a good deal of US energy production, the US Department of the Interior manages federal energy leasing (租凭)both on land and on the offshore Outer Continental Shelf Production from these sources amounts to nearly 30 percent of total annual US energy production.＜br＞
In 2000,32 percent of US oil,35 percent of natural gas, and 37 percent of coal were produced from federal lands, representing 20,000 producing oil and gas leases and 135 producing coal leases.＜br＞
Federal lands are also estimated to contain approximately 68 percent of all undiscovered US oil reserves and 74 percent of undiscovered natural gas.＜br＞
Revenues from federal oil, gas, and coal leasing provide significant returns to US taxpayers as well as State Government. In 1999, for example, $553 million in oil and gas revenues were paid to the US Treasury, and non-India coal leases accounted for over $304 million in revenues, of which 50 percent were paid to State governments. Public lands also play a critical role in energy delivery.＜br＞
Each year, federal land managers authorize rights of way for transmission lines, rail systems, pipelines, and other facilities related to energy production and use.＜br＞
Alternative energy production from federal lands falls behind conventional energy production, though the amount is still significant. For example, federal geothermal (地热) resources produce about 7.5 billion kilowatt-hours (千瓦时) of electricity per year,47 percent of all electricity generated from US geothermal energy. There are 2,960 wind turbines on public lands in California alone, producing electricity for about 300,000 people. Federal hydropower facilities produce about 17 percent of all hydropower produced in the United States.＜br＞
Because of the growing US thirst for energy and increasing public unease with influence on foreign off sources, pressure on public lands to meet US energy demand is becoming more intense.＜br＞
Public lands are available for energy development only after they have been evaluated through the land use planning process. If development of energy resources conflicts with management or use of other resources, development restrictions or impact moderation measures may be enforced, or mineral be banned altogether.
What is the main idea of this passage？ 查看材料
A.Public lands are one of the main sources of revenues
B.Public lands play an important role in energy production
C.Public lands should be developed to ease energy shortage
D.Public lands store huge energy resources for further development
第10题
第二篇 Energy and Public Lands
The United States boasts substantial energy resources. Federal lands provide a good deal of US energy production, the US Department of the Interior manages federal energy leasing(租赁) both on land and on the offshore Outer Continental Shelf Production from these sources amounts to nearly 30 percent of total annual US energy production.
In 2000, 32 percent of US oil, 35 percent of natural gas, and 37 percent of coal were produced from federal lands, representing 20,000 producing oil and gas leases and 135 producing coal leases. Federal lands are also estimated to contain approximately 68 percent of all undiscovered US oil reserves and 74 percent of undiscovered natural gas.
Revenues from federal oil, gas, and coal leasing provide significant returns to US taxpayers as well as State Government. In 1999, for example, $553 million in oil and gas revenues were paid to the US Treasury, and non-India coal leases accounted for over $304 million in revenues, of which 50 percent were paid to State governments. Public lands also play a critical role in energy delivery. Each year, federal land managers authorize rights of way for transmission lines, rail systems, pipelines, and other facilities related to energy production and use.
Alternative energy production from federal lands falls behind conventional energy production, though the amount is still significant. For example, federal geothermal(地热) resources produce about 7.5 billion kilowatt-hours(千瓦时) of electricity per year, 47 percent of all electricity generated from US geothermal energy. There are 2,960 wind turbines on public lands in California alone, producing electricity for about 300,000 people. Federal hydropower facilities produce about 17 percent of all hydropower produced in the United States.
Because of the growing US thirst for energy and increasing public unease with influence on foreign off sources, pressure on public lands to meet US energy demand is becoming more intense. Public lands are available for energy development only after they have been evaluated through the land use planning process. If development of energy resources conflicts with management or use of other resources, development restrictions or impact moderation measures may be enforced, or mineral be banned altogether.
36 What is the main idea of this passage？
A Public lands play an important role in energy production.
B Public lands are one of the main sources of revenues.
C Public lands should be developed to ease energy shortage.
D Public lands store huge energy resources for further development.
