听力填空

Morning, I’m AmyLee，glad to see you today!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！
No pain, 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one by one 分析给大家。

回复填空答案格式如下：1____2____3____...et.al.
I'm glad you brought up the question of our investigations into the ______of the Earth's interior. In fact, since this is the topic of your reading assignment for next time, let me spend these last few minutes of class talking about it. There were several important discoveries in the early part of this century that helped geologists develop a more accurate picture of the Earth's interior. The first key discovery had to do with ______ waves. Remember they are the ______caused by earthquakes. Well, scientists found that they traveled thousands of miles through the Earth's interior. This finding enabled geologists to study the inner parts of the Earth. You see, these studies revealed that these vibrations were of two types: ______ or P waves and ______ or S waves. And researchers found that P waves travel through both liquids and solids, while S waves travel only through solid matter. In 1906, a British geologist discovered that P waves slowed down at a certain depth but kept traveling deeper. On the other hand, S waves either disappeared or were reflected back, so he concluded that the depth marked the ______ between a solid ______ and a liquid ____. Three years later, another boundary was discovered, that between the mantle and the Earth's _____. There's still a lot to be learned about the Earth. For instance, geologists know that the core is hot. Evidence of this is the _____, ____that flows out of volcanoes. But we're still not sure what the source of the heat is.

答案原文

【填空答案】
1. makeup: n. ［singular］a particularly combination of people or things that form a group or whole（人或物的）组成，构成
2. seismic: adj. technical connected with or caused by earthquakes or powerful explorations 【术语】地震的；地震引起的
3. vibration: n. ［C,U］a continuous slight shaking movement 颤动，振颤，震动
4. compression: n. an increase in the density of something 压缩
5. shear: n. 【地】切变
6. boundary: n. ［C］the official line that marks the edge of a town, country etc 分界线，边界［+between］
7. mantle: n. ［C］technical the part of the Earth around the central core【术语】地幔
8. core: n. ［C］the central part of the Earth or any other planet 地心；（天体的）核心
9. crust: n. ［C,U］a thin hard dry layer on the surface of something（某物的）硬薄外层（the Earth’s crust 地壳）
10. molten: adj. molten metal or rock has been made into a liquid by being heated to a very high temperature 溶化的，熔融的（molten lava 熔岩）
11. lava: n. ［U］hot liquid rock that flows from a volcano（火山喷出的）岩浆，熔岩

【听力原文】
I'm glad you brought up the question of our investigations into the makeup of the Earth's interior. In fact --- since this is the topic of your reading assignment for next time --- let me spend these last few minutes of class talking about it. There were several important discoveries in the early part of this century that helped geologists develop a more accurate picture of the Earth's interior.
The first key discovery had to do with seismic waves --- remember they are the vibrations caused by earthquakes. Well, scientists found that they traveled thousands of miles through the Earth's interior. This finding enabled geologists to study the inner parts of the Earth. You see, these studies revealed that these vibrations were of two types: compression --- or P --- waves and shear --- or S--- waves. And researchers found that P waves travel through both liquids and solids, while S waves travel only through solid matter. In 1906 a British geologist discovered that P waves slowed down at a certain depth but kept traveling deeper. On the other hand, S waves either disappeared or were reflected back, so he concluded that depth marked the boundary between a solid mantle and a liquid core. Three years later another boundary was discovered --- that between the mantle and the Earth's crust. There's still a lot to be learned about the Earth. For instance, geologists know that the core is hot. Evidence of this is the molten lava that flows out of volcanoes. But we're still not sure what the source of the heat is.

听力精解

【听力精解】
接下来依旧是我将一条一条的难点分析给大家看：
1、即使本篇听力材料不是很难，但是上来第一句话着实很快，尤其是短语brought up连读，一不留神就漏掉这个短语。Makeup在后面出现了，我们经常见得makeup是化妆的意思，在这里这可不是化妆的意思，是构造、组成的意思。通过本句，我们就知道了该篇材料大致讲的是什么，有利于首先在大脑里形成一个预期，这样有利于理解那些比较专业的内容。

2、seismic waves，当遇到这个短语时可能我们又顿住了，如果不懂的话就记下这个单词的首字母，因为前面的The first key discovery预示着这个词在下面的内容很可能在出现，而且是一个中心词，所以试着看看能不能通过下文猜出具体的意思。

3、these studies revealed that these vibrations were of two types: 这句话有两点需要多说一下。首先，reveal意思是透露出，接下来是震动分为两种。其次是，根据我们的直觉，下面出现的很可能是重点，也很可能又是我们不认识的单词，所以要做好准备噢。

4、boundary between a solid mantle and a liquid core.短短一个句子里面有很多生词，boundary原指边界的意思，在这里也是边界的意思，但是指的是地心内不同结构的边界。然后重点来了，mantle这个词如果是背过俞敏洪的那本托福单词的同学们应该印象很深，反正我的印象是很深的，就是地幔的意思，还有下文出现的crust，是地壳的意思，lava是岩浆的意思。所以从一次侧面反映出，如果时间允许，大家一定要拿出一部分时间来看单词，单词量在阅读和听力上是一个可以起决定作用的因素。

5、看过一些同学的听写，大家在mantle和mentle,与core和coal上搞混了，他们的音标是不一样的，尤其是core和coal, l 美音发音会有一个舌头上翘的过程，大家一定要注意啊。
【参考译文】
我很高兴你们提出了关于地球内部构造研究的问题。实际上，这正是你们下次阅读作业的主题。因此，我想花下课前最后几分钟，给大家谈一谈这个问题。本世纪早期的一些重大发现帮助地质学家门描绘出了一幅更加精确的地球内部图像。
第一个重大发现和地震波有关。请记住，地震波是由地震引起的振动。科学家们发现，地震波在地球内部穿行数千英里。这个发现使得地质学家对地球内部进行研究成为了可能。这些研究表明：这些振动分为两种类型——横波（P波）和纵波（S波）。研究人员发现，P波能够穿过固体和液体，而S波只能穿过固体。
1906年，一位英国地质学家发现，P波在穿行到一定深度时候速度有所减缓，但是仍然继续深入。而S波在这个深度时要么消失了，要么被反射回去了。因此，他得出结论：这个深度标志着一个固态包裹层（地幔）和一个液态内核（地核）的分界。三年之后，另一个分界，也就是地幔和地壳的分界被发现了。

关于地球我们需要学习的东西还有很多。比如说，地质学家通过火山喷涌而出的熔化岩浆了解到地核是滚烫的。但是，这部分热量的来源仍然无法确定。

最后小小总结一下，本文不是很难，主要的难点集中在我们不熟的几个单词和稍微快的语速上，但是语速我们能适应，单词也可以慢慢背，所以大家要再接再厉，坚持到底。
祝大家每天进步一点点！
AmyLee