听力填空

本听力材料来自于老托partb，partc，是公认实施有效的听写材料，对于上手托福时间不长的同学非常适合。我曾经一次短时间备考听力提高了7分也归功老托。希望大家和我一样一定要坚持下来噢。相信坚持学习的同学听力上都会有很大的飞跃！

Nopain, no gain.我们的安排是这样的，第一遍用听力软件精听材料（建议做单句听写，听写的时候不要偷看我给的挖空题），然后按照我给的挖空题填关键词，回复后即可看到听力原文和文章精解，我将把难点和易错点oneby one 分析给大家。

回复填空答案格式如下：1____2____3____...et.al.

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 ______ or deep blue with black ______.
Beyond being nice to look at, these markings have a _____.They warn predators that these frogs are ______.When threatened, these frogs secrete a _______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 wind 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.

答案原文

【填空答案】

1.stripes n. 条子布；条纹布（stripe复数形式）

2.spots n. 斑点（spot的复数）；插播广告；花点布，点子花纹棉布；置球点

3.purpose n. 目的；用途；意志

4.poisonous adj. 有毒的；恶毒的；讨厌的

5.substance n. 物质；实质；资产；主旨

【听力原文】

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 wind 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.

精解译文

【听力精解】

这篇听力我真觉得听晕了，讲的条纹青蛙（记住醒目颜色的frog都是为了warning），生物书上也讲过。

这种青蛙皮肤可以分泌物质毒死食者，不过他们的毒很快就被人类加以利用了。

文中讲到的青蛙如果听着晕的话，可以用不同的字母标记出来。

最后有一个stimulant 说的是兴奋剂，像一剂兴奋剂一样刺激神经系统

【参考译文】

如果您喜欢我们刚才看到的五颜六色的动物，你会喜欢这些动物。青蛙。通常你可能不认为作为丰富多彩的青蛙，但肯定是这些青蛙。他们是中美洲和南美洲的毒镖青蛙。看看他们醒目的颜色---经常黄色与黑色条纹，或有黑色斑点的深蓝色。
除了好看，这些标记有一个目的。他们警告捕食者，这些青蛙是有毒的。受到威胁时，这些青蛙会分泌一种物质通过他们的皮肤会很容易地杀死任何动物可以尝试吃。其鲜艳的色彩沟通这一点，所以大多数动物往往不能追捕他们。
现在，狩猎，几个世纪以来，这些青蛙后寻求猎人。正如你可能会认为，猎人们不想吃青蛙，而是，他们捕捉到他们的毒药。他们将加入毒药，他们的狩猎箭头提示---当然，时下最猎人使用枪支。
这些天镖毒蛙是扣除利息，而不是医学研究人员的猎人。研究人员认为，他们可以使新的心脏药物的毒，因为它作为一种对人体的中枢神经系统的兴奋剂行为。研究人员认为，他们可以用它来刺激心脏衰弱。
有，然而，与这些青蛙做研究的问题。那些在风中捕获的会产生他们，直到他们死去的毒药。然而，那些在圈养出生的，你在这里看到的一样，不会产生任何毒。

祝大家每天进步一点点！

AmyLee