托福美国听力学科真题文本220篇pdf.docx

智课网TOEFL备考资料 托福美国听力学科真题文本220篇pdf下载 摘要： 托福美国听力学科真题文本220篇pdf下载!为扩大同学们的听力训练量，小编特为同学们整理了美国听力学科真题文本220篇内容，此资料非常地道取自美国专业期刊，同学们有足够的时间话可以拿来阅读下，想取得高分的同学更不可错过哦!  托福 美国听力学科真题文本220篇pdf下载!为扩大同学们的听力训练量，小编特为同学们整理了美国听力学科真题文本220篇内容，此资料非常地道取自美国专业期刊，同学们有足够的时间话可以拿来阅读下，想取得高分的同学更不可错过哦!  Narrator  Listen to part of a lecture in biology class.  针对大家 托福听力 提分困难的复习处境， 小马 有开发出模拟托福听力考场环境的托福听力APP,小马托福听力APP中涵盖了TPO1-34听力真题全部内容的，答案解析应有尽有。为让同学们能够有条不紊的提高听力能力，小马托福听力APP开启两种模式：“修炼”、“闯关”，两大模式进行魔鬼式训练。另外还有5000+词汇、1000+经典句子、200+文章，这么大的诱惑还等什么快来扫一扫下面的二维码下载使用吧!  Prof:  Youve been reading about animal behavior. Today well discuss one of the most astonishing behaviors in the animal world: dancing bees. Did you know that bees can dance? Well, neither did scientists, until the 1960s. Thats when a German scientist, named, uh, Karl von Frisch, noticed something truly remarkable. As he was observing honeybees, he noticed that some of the bees, which he called scout bees, flew out of the hive to look for food. When a scout found a site where there was food, it flew back to the beehive and started dancing. This dance somehow told the other honeybees where the food was, because after the dance, the bees... [false start] some of the bees flew from the hive straight to the site of the food. Von Frisch called the bees that collect the food forager bees. He thought the scout bees dance told the forager bees three things -- first, the smell of the food it had found; second, which direction to fly to reach the food; and third, the distance of the food site from the beehive. Von Frisch won the 1973 Nobel Prize for this discovery, but many scientists were skeptical of his theory. They didnt believe it was the dance that led the forager bees to food. Instead, they thought it might be, oh, the smell of the food on the dancing bee, or maybe that they just followed the scout back to the food site. Well, very recently, some British scientists used a new type of radar to prove that