Professor：Good, that’s a prominent constellation. Let’s take a look at Orion. The name refers to a hunter in Greek mythology. Orion is usually visible in the night sky from November to February when it’s winter in the norther hemisphere and summer in the southern hemisphere.
Lecture中教授提到了猎户星座，并详细介绍了猎户星座在不同半球的可见时间。
题目问 提及猎户星座的原因：
1. Why does the student mention Orion
A. To explain how she became interested in astronomy
B. To point out that the pattern of stars in a constellation can be difficult to identify
C. To give an example of a constellation named after a mythological figure
D. To ask a question about the names of constellations
再例如：IAU
So, in the 1920s the international astronomical union or IAU came up with an official list of 88 constellations.The IAU first had to agree on a list of constellations that combined traditional constellations with constellations that had been established more recently.Then, they defined precise boundaries for each constellation.
2.According to the professor, what were the accomplishments of the International Astronomical Union in the 1920s
Click on 2 answers.
A. Assigning scientific names to the traditional constellations
B. Determining the approximate number of stars in each constellation
C. Deciding which star configurations should be considered constellations
D. Dividing the night sky into well-defined regions
2. 原因、结果
任何类型的lecture题目当中都有可能会考到此类问题。一般来讲，在托福听力中，表示原因的听力内容值得我们的关注，在托福听力有较多的表达原因的逻辑词，常常我们都会误以为只有because会考到，这是由于我们日常接触的原因类的词汇只有一个。事实上有since、as、 for、 the reason is that 等表达方式都表示原因，这需要我们的日常积累。
TPO 18 European History:
It’s commonly said that medieval Europeans wanted spices to cover up the taste of spoiled meat. But this isn’t really true. Anyone who had to worry about spoiled meat couldn’t afford spices in the first place. If you could afford spices, you could definitely afford fresh meat.
We also have evidence that various medieval markets employed a kind of police to make sure that people did not sell spoiled food, and if you were caught doing it, you were subject to various fines, humiliating public punishments. So what actually was true was this: In order to have meat for the winter, people would preserve it in salt, not a spice. Spices actually aren’t very effective as preservatives.
What two factors explain why medieval Europeans did not use spices to cover the taste of spoiled meat? Click on 2 answers
A、Fresh meat was less expensive than spices were.
B、Spices were mainly used in incense and perfume.
C、The sale of spoiled food was prohibited.
D、Salt was cheaper than most spices were.
在托福听力中，通常会使用不同的例子来加强教授内容的学术严谨性，论证教授的观点所以当听力中出现for example、 for instance、 let’s say, let’s put it this way, just like、just as, as we all know 等说法时我们一定要保持足够的警觉。
/例1：
In other words, these same basic strategies are used by the chameleons and frogs and insects we talked about. And by larger animals as well, for example the tiger’s example of black stripes on a lighter background is a form of disruptive coloration…
A. To illustrate that the results of the cephalopod research can be extended to many other animals
B. To give an example of an animal whose crypsis strategy has been extensively studied
C. To point out how different its crypsis strategy is from the strategy used by smaller animals
D. To argue that predators rely on crypsis less than prey species do
Professor：Yeah, and that’s the beauty of the synthesizer. You can make sounds faster, slower, higher pitched, lower pitched, you can of course change the volume. You can make a single chord reverberate through an entire song, something the best musicians can’t do with a conventional instrument. And all of this can be done as you can imagine relatively quickly. No more tape splicing. It’s kind of like making furniture using modern power tools instead of hand tools. The difference is that dramatic.
1. Why does the professor mention furniture making
A. To explain that creativity is required whether composing music electronically or traditionally
B. To emphasize the relative ease of composing music on a synthesizer
C. To suggest that given the right tools, almost anyone can compose music
D. To demonstrate that electronic music is a unique art form
Professor：Probably the most important musical development of the twentieth century was the emergence of electronic music. The ability to generate sound electronically opened up many new possibilities for composers. So, let’s look at three major breakthroughs in this area.
