等电位操作人员在接触或脱离导线瞬间,有电容电流从人体通过

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等电位操作人员在接触或脱离导线瞬间,有电容电流从人体通过

考点:线路运行与检修专业考试高压线路带电检修工(综合练习)高压线路带电检修工(综合练习)题库
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Suddenly, the economics of American suburban life are under assault as skyrocketing energy prices inflate the costs of reaching, heating and cooling homes on the distant edges of metropolitan areas. Just off Singing Hills Road, in one of hundreds of two-story homes dotting a former cattle ranch beyond the southern fringes of Denver, Phil Boyle and his family openly wonder if they will have to move close to town to get some relief.

They still revel in the space and quiet that has drawn a steady exodus from American cities toward places like this for more than half a century. But life on the edges of suburbia is beginning to feel untenable. Mr. Boyle and his wife must drive nearly an hour to their jobs in the high-tech corridor of southern Denver. With gasoline at more than $ 4 a gallon, Mr. Boyle recently paid $121 to fill his pickup truck with diesel fuel. In March, the last time he filled his propane tank to heat his spacious house, he paid $ 566, more than twice the price of 5 years ago.

Though Mr. Boyle finds city life unappealing, it is now up for reconsideration. "Living closer in, in a smaller space, where you don’t have that commute," he said, "It’s definitely something we talk about. Before it was’we spend too much time driving.’ Now, it’s ’we spend too much time and money driving.’ "

Across the nation, the realization is taking hold that rising energy prices are less a momentary blip than a change with lasting consequences. The shift to costlier fuel is threatening to slow the decades-old migration away from cities, while exacerbating the ’housing downturn by diminishing the appeal of larger homes set far from urban jobs. In Atlanta, Philadelphia, San Francisco and Minneapolis, homes beyond the urban core have been falling in value faster than those within, according to an analysis by Moody’s Economy. com. In Denver, housing prices in the urban core rose steadily from 2003 until late last year compared with previous years, before dipping nearly 5 percent in the last three months of last year, according to Economy. com. But house prices in the suburbs began falling earlier, in the middle of 2006, and then accelerated, dropping by 7 percent during the last three months of the year from a year earlier.

Many factors have propelled the unraveling of American real estate, from the mortgage crisis to a staggering excess of home construction. But economists and real estate agents are growing convinced that the rising cost of energy is now a primary factor pushing home prices down in the suburbs. More than three-fourths of prospective home buyers are now more inclined to live in an urban area because of fuel prices, according to a recent survey of 903 real estate agents with Coldwell Banker, the national brokerage firm.

From the first two paragraphs we can learn that().

A.soaring energy prices caused inflation in America

B.rising energy prices are threatening Phil’s cattle business

C.jumping fuel prices make suburban life costlier

D.shooting fuel costs make urban life unappealing

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一般而言,实务中的股利政策有( )。

A.固定股利政策

B.剩余股利政策

C.零股利政策

D.固定股利支付率政策

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什么叫做合理营养,其具体标准是什么?

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压缩机压缩气体时,压缩比越大,出口气体温度越低。

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钻井搬迁安装应符合以下规定()

A.陆上钻井队应制定并落实搬迁安装安全技术措施;

B.设备运输应符合道路交通相关要求。装运设备前首先应进行清洁、清除污染源;

C.搬迁安装应有现场安全监督。设备吊装应有专人负责指挥。设备安装应符合规范要求;

D.桶装液态化学药品要轻拿轻放,避免剧烈振荡或损坏;

E.装运设备时防止对周边植被或农作物造成损坏。

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