问题 问答题 简答题

在选址阶段的人口调查中,我国常用的筛选厂址方法是哪几种?

答案

参考答案:

如何应用?目前在我国应用最多的是固定区域法和人口密度法。其中固定区域法适用于人口相对低的地区。该方法的基本假设是电厂被一个固定大小的地带所包围(禁区),该地带内不允许居民居住。在这一地带外围规定另一个低人口地带,在低人口地带内(限制区),人口和工业的增长在规划上予以限制或明确地控制。不同国家这两个区的半径范围不一致,我国的禁区半径规定不小于500米,限制区半径为5公里。人口密度法是将推荐厂址周围确定区域内的人口密度与参考人口密度(如省和地区的平均密度)作比较。该方法将厂址周围地带分成同心圆环和扇形区,在考虑厂址周围同心圆环内居民数,和厂址附近应急条件的情况下,进行计算比较来确定厂址的类别。

完形填空
One afternoon in January in 1998, Susan Sharp, 43, and her 8-year-old son David, were walking across an icy square,       Susan's cane(手杖) slipped on the ice. Her face        first into the mud. David        her mother's side, “Are you all right, Mom”      , Susan pulled herself up, “I'm okay, Honey,” she said.
Susan was falling more      since she had trouble walking. Every inch of ice was a       danger for her. “I wish I could do something,” the boy thought. David, too, was having        of his own. The boy had a speech problem, so at school he talked       .
  One day, David's teacher announced  a        homework. "Each of you is going to come up with an       ," she said. This was for "INVENT AMERICA", a national competition to encourage creativity in children.
  An idea        David one evening. If only his mother's cane didn't slip on the ice. “What if I        your cane to a nail coming out of the bottom” he asked his mother.
  “        the sharp end would scratch(划破) floors,” Susan said.
  “No, Mom, I       make it like a ball-point pen. You take your hand off  the button and the        returns back up.” Hours later the cane was finished. David and his father        as Susan used it to walk 50 feet about the       . Happily Susan cried out, “It        !”
In July 1999, David was      national winner for the "INVENT AMERICA". David began to make public appearance. Thus he was forced to communicate      .Today, David is nearly free of his speech problem, and his cane is becoming well accepted.
小题1:
A.WhereB.whileC.whenD.then
小题2:
A.fellB.touchedC.layD.dropped
小题3:
A.stood byB.rushed toC.looked atD.ran around
小题4:
A.FirmlyB.EasilyC.QuicklyD.Shakily
小题5:
A.slowlyB.frequentlyC.freelyD.heavily
小题6:
A.hidingB.certainlyC.possible D.waiting
小题7:
A.methodB.diseaseC.troubleD.hope
小题8:
A.few B.littleC.much D.more
小题9:
A.usefulB.strangeC.commonD.special
小题10:
A.appearanceB.inventionC.experienceD.experiment
小题11:
A.remindedB.encouragedC.occurred D.hit
小题12:
A.fastenedB.stuckC.fixedD.tied
小题13:
A.So B.AndC.ForD.But
小题14:
A.mightB.wouldC.didD.need
小题15:
A.penB.hand C.cane D.nail
小题16:
A.watchedB.supportedC.noticedD.helped
小题17:
A.street B.iceC.yard D.square
小题18:
A.worksB.operates C.succeeds D.helps
小题19:
A.declaredB.received C.wonD.praised
小题20:
A.more slowlyB.more carefullyC.more clearlyD.faster
选择题