四级练习2014.08.12
[audio]http://sound.yywz123.com/tingbbs/cet4/cet420140812.mp3[/audio]Encouraging consumers to save energy has become a fairly common way for electric utilities to level peak-period loads and avoid building costly new power plants.(1)_______________________.As this winning refrigerator will likely be more expensive to manufacture than conventional models, the utility group intends to use the money to pay part of the cost of the mass-produced winning refrigerators so that they can be sold at a competitive price.Refrigerators use 25 to 30 percent of the average household's electricity.Refrigerators made 20 years ago consume some 1,500 to 1,800 kilowatt-hours annually.The new refrigerator would use 25 to 50 percent less electricity than will be required by Department of Energy standards, that is,about 900 kilowatt-hours.(2)_______________________.That would save the average owner up to 200 a year in electric bills over a 15-year old refrigerator.
**** Hidden Message ***** now in the twist of the idea,a group of utilities is offering 2500-3000 to the manufature comes up with the most efficient cost effective of refirgerator.
the utility group is hope to find one is still use less energy 300-500 kilowatts per hour
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