新东方托福名师助航 成就北美留学幻想

  下面新东方网托福频道为大家整理了2010年2月份托福机经听力资料重复08年8月8日北美(康教员预测),供考生们参考,以下是详细内容。

  2008.08.08(北美)
  1. 女学生的宿舍中间有违禁的东西,电水壶已经被不晓得怎么样了,因为可能起火。当然最大的问题还是那个比规则的5 立方米大了整整一倍的电冰箱。学生說我在他人那里买的,怎么她都没事?结果那个人住的中央比较特别,不太遵守類似的规则。学生继续埋怨,說自己找了好几个人抬上三樓,都没人管。最后說,不然你把它卖了,不然你把它留下,但是要搬出你的宿舍。
  2. 鸟類的行为。有一种雄鸟为了交配会筑巢,很漂亮的。有各种装饰,一般都是浅藍色的。分别引见了三种形式的小房子,从最简单到最复杂的。然后雄鸟吸引雌鸟注意之后,还会扮演……P 不解的說,不晓得为什么这些雄鸟为什么花这么大的功夫,而且不晓得这是后天习得的,还是先天的行为。
  3. 环境工程课程,讲可再生资源和不可再生资源。讲了往常的可再生资源有太阳能,简单的引见了下,局限性是地域的光照时间和强度(有题)。然后是风能的利用,局限是风不稳定,贮存艰难(有题),很难做主要供电方式,但能够做secondary;而且风車的那个葉片可能会打到鸟類(有题)。最后又讲了海洋能的利用,先是說潮汐tide的涨落,需要建坝增加水位差,一定水位差后开闸发电;然后学生提问了海洋热能的利用,教授說是很好的方向,有一定的应用,还引见了什么设备(有题)。
  康老师充电站
  WATER POWER
  Water power, or hydropower, furnishes[To supply; give供给;提供:] about 7 percent of the world’s commercial energy.
  Where water flows from a high place to a lower one, the gravitational energy of the falling water canbe captured and used to produce other forms of energy.
  TIDAL ENERGY
  Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong.
  Compared with the tides, the waves created by the wind are surface movements felt no more than a hundred fathoms below the surface.
  The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.
  Tide is the periodic rise and fall of oceans and other waters of the earth in response to the gravitational forces of the moon and the sun. There are one or two high tides and one or two low tides each day.
  This energy can be captured by closing a bay with a dam. As the tide rises, the bay fills with water. At high tide, the dam is closed to hold the water in the bay. At low tide, the stored water is released through a turbine to generate electric power.

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