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2017年4月23日托福口语预测网友版

2017-04-21 11:12:30来源:网络

  2017年4月23日托福口语预测网友版TASK3-6:

  1、考题出现时间:2014-12-12NA

  话题

  priority effect--animal species, when first settling on certain territory, makes the territory less habitable for later species.

  阅读要点

  Reading: priority effect--animal species, when first settling on certain territory, makes the territory less habitable for later species. This is esp. prevailing for small and weak species.

  听力要点

  Listening: for example, there is a type of small ants that net on an kasha trees. As the first group of settlers onto the tree, they destroy part of tree’s nectars and render it unable to produce nectars anymore. This is because another type of bigger ants, which feed on this nectar and are more aggressive than smaller ants, will no longer comes to this tree for occupation. Through this small ants survive.

  2、考题出现时间:2015-5-30CN

  阅读:Appeasement开头的一种动物的behavior。为了avoid stronger animal会做出—些行为或者放出一些信号以示弱,

  听力:教授举了wolf为例子,当狼群为了食物争夺的时候,小的狼会低下自己的的头以避免伤害。这时候大的狼会不去伤者它们。

  3、考题出现时间:2015-9-13CN

  Recruitment

  Reading: Release signals to inform other insects to cool and cooperate.

  Listening: There is a type of ant called the fire ant living in South America that live in nests. Some ants have a special job: They have to leave the nests to find food. When one ant finds a piece of fruit that is too big or it to carry back, it will walk back while at the same time releasing a chemical, which will form a chemical trail on the way. When it arrives, other ants could follow the trail and find the fruit and then carry it back together.

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