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[IBT听力] 老托福minilecture 听力+文本+题目+答案

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发表于 2016-5-17 15:14:48 | 显示全部楼层 |阅读模式
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时间为3分钟,每个讲座有6个题目。这个材料适合大家在基础不好的时候做听写,或者精听使用。讲座的逻辑和范围和真实考试一致。如果你是在15分左右,需要提高听力的精准度,需要提高词汇的储备,这个材料非常好。很多基础不好的同学,都是听力这个材料,再加上结构听力法,可以考到20分以上。基础稍好的,能有25分以上!
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minilecture答案.pdf (37.97 KB, 下载次数: 3)
minilecture题目.pdf (1023.45 KB, 下载次数: 3)
  P: Yesterday, we were talking about seed dispersal, which is necessary to the survival of the plant species. So, what are some ways that seeds get spread around? Yes.
  M: Some seeds are in fruits that attract birds and other animals. And when the animals eat the fruit, the seeds don’t get digested because they have a hard covering. So they pass right through the animals’ digestive system and get deposited back into the soil.
  W: But some fruits are poisonous which will discourage animals from eating the seeds right?
  P: Well, even though many fruits are poisonous to humans and other animals, most can be eaten by some variety of bird. For example, the berries of a family of plants called nightshade can be deadly to humans. But some birds eat these berries as a regular part of their diet.
  W: Still it seems to me that if a seed is inside a fruit that is not poisonous to see if it has a better chance of getting spread and so plants will tend to evolve without poisoning their fruits.
  P: Well, some poisons are actually quite helpful to fruits. For example, the poison in nightshade berries is a type of chemical called glycoalkaloid. Researchers have found that the glycoalkaloid in nightshade berries inhibits the growth of fungi. So it keeps the fruit from rotting. They’ve also found that the glycoalkaloids give nightshade berries a strong bitter of flavor, making them distasteful to some animals that might otherwise eat them. Still, some birds do eat them.
 
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发表于 2016-5-17 21:40:24 | 显示全部楼层
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