在托福听力中，我们往往会碰到一些教授提问，学生回答，或者学生提问，教授回答的情况。那么，我们就会有一个疑问，这些是在枯燥的演讲中的纯聊天吗？为了让我们听的不那么紧张而给我们缓解一下压力的吗？

当然，不是！这恰恰是我们的重点，因为考点早就在我们不知不觉中讲完了。下面我们就一起来分析一下这些情况。

首先，我们来看一种最常见的情况，那就是教授提问，学生回答。

第一种：在听力中，教授在对某一主题的演讲进行讲解的时候，往往中间会穿插一些提问，让学生补充一些信息，活跃气氛，增强互动，也有助于学生对内容的理解和掌握。

我们先来看一道例题（例题1：TPO31lecture2Geology）：

Professor: Paul, can you remind us what is a subduction zone is ?

Student: Yeah, UM...basically, a subduction zone is where two tectonic plates collide. so if an ocean floor tectonic plate meets the edge of a continent and they push against each other, the heavier one sinks down the and goes under the other one. So the ...um...the oceanic plate is made of denser and heavier rock, so it begins to sink down under the continental plate and into the mantle.

然后我们看一下对应的题目：

Based on the discussion, what happens when a continental plate and an oceanic plate collide?

A. The edge of the oceanic plate moves down into the mantle.

B. Slab pull causes the ocean floor to expand.

C. New rock material rises to the surface at the subduction zone.

D. Parts of each plate break off into the ocean.

根据学生所阐述的知识点，我们非常容易就可以得出这题的答案是A，这个选项几乎和文本的句子完全吻合的。

第二种：另外一种情况也是比较常见的，那就是学生提问，教授回答。在听的过程中，学生难免会对教授所讲述的知识点有些疑惑，在他们提出问题之后，教授也会有针对性地进行回答。

（例题2：TPO31lecture4 Anthropology）

Student：So can we tell from those horse bones if it was sort of the same for the horses?

Professor: Actually. It wasn’t. We know that horses have not changed a lot physically as a result of domestication. So those ancient horse bones don’t tell us much about domestication.

对应的题目：

What point does the professor make from the horse bones found in the Botai settlements?

A. They do not reveal information about horse domestication

B. They are very different from the bones of modern horses

C. They date to the period when the Botai people had become nomads

D. They suggested that horses were first domesticated by another ancient people

因此，从以上两个例子当中我们不难看出，这一类演讲中的问题具有几个特点：

1.不管是教授提问还是学生提问，我们对于问题还是比较容易听到的，也是比较清晰的，几乎可以和我们题目的题干相吻合。2.我们的题目的正确答案基本上就是放置在了回答的这一段内容里。所以我们在听的时候笔记的重点就要放在针对问题回答的那一段话上。当然也不是要求把回答的没一句话都记下来，只需要记下核心信息即可。

接下来，我们再来看一种相对不那么明显的“对话”，即教授的自问自答。

（例题3：TPO31lecture2 Geology）

Professor：But what about over the long term? Say 250 million years or more. Well, over that length of time, forecasts become more uncertain. But lots of geologists predict that eventually all the continents, including Antarctica, will merge and become one giant land mass, a super continent, one researchers calling Pangaea Ultima, which more or less means the last super continent.

对应的题目：

What long-term geopredictions do many geologists make?

A. Continents will become smaller than they are now.

B. Subduction will cause one continent to sink under an ocean.

C. North and South America will move away from each other.

D. The current continents will eventually join together.

这种演讲中的“对话”是我们要特别去注意的，因为这个特别容易被我们忽略，一直都是有教授一个人对知识点进行一个阐述，可能在不知不觉中已经讲完了。不像是第一种当中会直观的，另一个不同的声音的对我们的耳朵有个直接的刺激，提醒我们注意考点。

以上就是托福听力的演讲中由“对话”所带来的考点，希望对备考的同学能够带来一些启发和帮助。