PTE听力练习题82-老托93-Dart-poison Frogs

PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书(PLUSTestbuilder, OG)之外,就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。墨尔本文波雅思PTE培训学校专门为墨尔本,悉尼PTE考生准备了PTE练习的lecture 93篇。各位PTE同学可以练习阅读,练习记笔记技巧,可以练习复述,甚至可以练习describe image。废话少说,下面开始:


If you liked the colorful animals we just saw, you’re going to love these next animals: frogs. You might not normally think of frogs as being colorful, but these frogs definitely are. They are the dart-poison frogs of Central and South America. Look at their striking colors, often yellow with black stripes or deep blue with black spots. Beyond being nice to look at, these markings have a purpose. They warn predators that these frogs are poisonous. When threatened, these frogs secrete a substance through their skin that would easily kill whatever animal might try to eat them. Their bright colors communicate this, and so most animals tend not to hunt them. Now, speaking of hunting, for centuries these frogs were sought after by hunters. As you might think, the hunters didn’t want to eat the frogs, but rather, they captured them for their poison. They would add the poison to the tips of their hunting arrows. Of course, nowadays most hunters use guns. These days, dart-poison frogs are of less interest to hunters than to medical researchers. Researchers believe that they can make new heart medicine from the poison, because it acts as a stimulant on the body’s nervous system. Researchers think they could use it to stimulate a weak heart. There is, however, a problem with doing research on these frogs. Those that are caught in the wild will produce their poison until they die. However, those that are born in captivity, like the ones you see here, will not produce any poison at all.

【生词摘录】

 1. normally: adv. 正常地,通常地
 2. striking: adj. 显著的,惹人注目的,鲜明的,惊人的 
 3. stripe: n. [C]斑纹,条纹
 4. spot: n. [C]斑点
 5. beyond: prep. 除„„之外
 6. marking: n. 记号,斑纹
 7. predator: n. 食肉动物
 8. secrete: v. 分泌
 9. arrow: n. 箭
 10.stimulant: n. 刺激物
 11.stimulate: v. 刺激
 12.captivity: n. [C]俘虏,囚禁

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