为了帮助大家提升托福听力，我们为大家带来这篇文章。

　　托福听力所有题型中，占到比例最大的是细节题，对于很多的同学来说也是一个比较头疼的题型。而在此基础之上，再把难度进一步提升的是双选型的细节题，很多同学会发出这样的感概：单选都已经挺难，还让我选两个，简直要我命啊!而在教学的过程中也发现，很多的同学基本只能选对一个，当然成功避开两个正确答案，选择两个错误答案的也不在少数。

　　那么，对于双选题，同学们究竟该怎么破呢?

　　从TPO中的双选题出题思路来看，双选题的答案还是可以总结出一定规律的，同学们在做题的过程中也要多总结，多思考，在听力的过程中进行准确定位，对于出题点进行有效的预判并在笔记中进行记录标记，还是可以很容易解决双选题的。

　　双选题出题思路：并列结构

　　e.g.TPO13-L1-Q3

　　教授在讲解建造步行街所要考虑的两个关键因素：位置和设计

　　然后在讲解位置的时候又引出了选择位置时所要考虑的两点因素：接近潜在客户群和接近公共交通

　　文中首先出现了这样的信号词：two considerations，之后便紧接着出现了一个并列结构：proximity to potential customersand accessibility to public transportation

　　当我们在笔记中把customer 和 transportation两个关键词都记录到的话

　　再来看题目

　　What are two aspects of location that need to be considered when planning a pedestrian mall?Click on 2 answers

　　A. The proximity to the customer base

　　B. The number of nearby tourist sites

　　C. The variety of restaurants in the area

　　D. The access to public transportation

　　很容易的就会在选项A & D中找到我们需要的关键信息

　　参考原文：

　　Well, there are two critical factors to consider when creating a pedestrian mall - location and design, both of which are equally important. Now let's start with the location. In choosing a specific location for a pedestrian mall, there are in fact two considerations: proximity to potential customers, um...that's what we would call a customer base, and accessibility to public transportation, which we will get to in just a moment.

　　我们再来看一个例子

　　e.g. TPO15-L1-Q2

　　文章开始部分提到了一个叫做CFQ的问卷，用于调查人们在不同情况下被干扰的频率问题;而当学生提及自己忘记存电脑文件并非是并干扰而就是单纯忘记之后，老师提出了”And that's part of the problem with the CFQ.”

　　并指出问题是 “It doesn't take other factors into account enough, like forgetfulness.”之后老师又引出了第二个问题 “Plus, you really can't say you are getting objective scientific results from a subjective questionnaire where people report on themselves.”

　　从这段文本中我们发现了一些并列结构的线索——part of the problem，潜在的含义就是problem不止一个部分，至少还有另外一个部分，之后的plus也正式了这一点。

　　这里的part of 就和其他TPO中出现过的one of差不多，one of隐含的其实也是一个包含两点的并列结构。

　　通过上面的文本，我们锁定了笔记关键词

　　1.×other factor

　　2. subj

　　来看题目

　　According to the professor, what are two weaknesses of the Cognitive Failures Questionnaire?Click on 2 answers

　　A.It relies on subjective reporting.

　　B.It assesses a limited number of situations.

　　C.It does not assess visual distractions

　　D.It does not account for factors other than distractibility.

　　根据笔记，锁定答案A/D

　　由上述两个例子可以看出，同学们在听文章时应有意识的去把握文中的一些并列成分，如并列的原因，结果，例子，建议，问答等等，并注意一些常用来连接并列事物的词，如最简单的序数词first, second, third，再如其他并列词：one (of), part of, plus, next, also, another, the other, besides, in addition, etc.

　　当然，需要指出的是，有些双选题的答案可能会在文章前后出现，或者听不出文中明显的并列结构。这种题目的难度比在文章直接出现的并列结构更加难于定位。

　　e.g. TPO19-L2-Q5

　　这是一篇比较难的天文学文章，文章后面提到radio wave的时候老师提到了它的一个problem，用了one problem，

　　“One problem is that radio waves from these far away objects, even though they can get through, are extremely faint.”

　　很显然，按照我们前面讲过的one problem可能后面接下来是会再出现第二个problem

　　然而，这篇文章后面并没有紧接着立马出现说the second problem或者another problem

　　而是在讲了蛮多内容之后，通过师生互动提问的方式引出了第二个problem

　　“Female Student

　　Well, if the radio waves are so good at getting through the universe, what's the problem?

　　Professor

　　Well, answer this, how come people have to turn off their cell phones and all our electronic devices when an airplane is about to take off?

　　Male Student

　　The phones interfere with the radio communication at the airport, right?

　　Female Student

　　Oh, so our radio waves here, on Earth interfere with the waves from space?

　　Professor

　　Yes, signal from radios, cell phones, TV stations, remote controls, you name it, all these things cause interference.”

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