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职称英语考试理工类A级概括大意题
职称英语考试理工类A级概括大意题
下面的短文后有2项测试任务：
(1)第23～26题要求从所给的6个选项中为第2-5段每段选择1个最佳标题；
(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
Natural Gas
1 Natural gas is produced from reservoirs deep beneath the earth's surface．It is a fossil fuel
(矿物质燃料)，meaning that it is derived from organic material buried in the earth millions of yearsago．The main component of natural gas is methane(甲烷)．
2 The popularity and use of clean natural gas has increased dramatically over the past 50 years as pipeline infrastructure(基础设施)has been installed to deliver it conveniently and economically to millions of residential，commercial and industrial customers worldwide．Today，natural gas serviceis available in all 50 states in the U．S．，and is the leading energy choice for fueling Americanhomes and idustries。More than 65 million American homes use natural gas．In fact，natural gas isthe most economical source for home energy needs，costing one-third as much as electricity．In addi-tion to heating homes，much of the gas used in the United States is used as a raw material to manu-facture a wide variety of products，from paint，to fibers for clothing，to plastics for heahhcare，con-puting and furnishings．Natural gas is also used in a significant number of new electricity-generating power plants．
3 Natural gas is one of the safest and cleanest fuels available．It emits less pollution than oth-er fossil fuel sources．When natural gas is burned，it produces mostly carbon dioxide(二氧化碳) and water vapor-the same substances emitted when humans exhale．Compared with some other fos-sil fuels，natural gas emits the least amount of carbon dioxide into the air when combusted(燃烧)， making natural gas the cleanest burning fossil fuel of a11．
4 The United States consumes about one-third of the world'S natural gas output，making it the largest gas-consuming region in the world．The U．S．Department of Energy'S Energy Information Ad-ministration forecasts that natural gas demand will grow by more than 50 percent by 2025．
5 There are huge reserves of natural gas beneath the earth's surface．The largest reserves of natural gas can be found in Russia，West and North Africa and the Middle East．LNG(液化天然气)has been produced domestically and imported in the United States for more than four decades．
Today，the leading importes of LNG are Japan，Korea，France and Spain．
23．Paragraph 2_________．
24．Paragraph 3________．
25．Paragraph 4_________.
26．Paragraph 5________．
A．Popularity and use of natural gas
B．Natural gas reserves and supply
C．Natural gas prices
D．Clean fuel of choice
E．Disadvantages of natural gas
F．Natural gas consumption
27．Natural gas is stored deep________．
28．Natural gas is recognized as the most economical energy source_________．
29．When manufacturing many products，people commonly use natural gas____________．
30．It is estimated that by 2025 that natural gas demand in the United States will increase_________．
A．over the past 50 years
B．beneath the earth surface
C．by more than 50 percent
D．for more than four decades
E．as a raw material
F．for home energy needs
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