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托福聽力中的數字重要嗎?要提升辨音能力

2019-06-13 10:52:17瀏覽量:395

大家都知道托福聽力的選擇題中一般不考具體數字是多少這樣的問題,但是數字是否是出題信號和出題點呢?

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  大家都知道托福聽力的選擇題中一般不考具體數字是多少這樣的問題,但是數字是否是出題信號和出題點呢?今天我們就通過幾套真題中出現的數字,一起來探討一下數字是否重要這個問題。

  首先:我們看一下TPO22lecture4的第二題:

  Why does the professor point out that 20,000 jobs for musicians disappeared at the end of the silent-film era?

  A. To explain that many movie theaters closed at the end of the silent-film era

  B. To explain that live music had lost popularity

  C. To illustrate the huge demand for musicians during the silent-film era

  D. To emphasize the number of jobs created by the production of sound movies

  在題干中非常明確的問到為什么提及20,000 jobs for musicians disappeared也就是說提到20000個工作機會沒有了的目的是什么呢?

  在原文中教授強調了無聲電影時期電影院是音樂人最好的工作選擇高薪且工作需求量大We are talking a period of maybe thirty years where working in movie theaters was the best job for musicians. It was very well-paid.The rapid growth of the film industry meant movie theaters were popping up everywhere.

  由此產生了很多工作崗位,多到什么程度呢?后面 So suddenly there was this huge demand for musicians. In fact, over 20,000 jobs for musicians were gone, disappeared at the end of the silent-film era, 20,000. Ok. So from the beginning, music was a big part of film, even at the first… 在這個部分教授強調這個數字20,000,強調了兩遍,目的非常明顯了,主要起到強調失業人數多的作用。既然在無聲電影末期有如此多的人失業這也說明在無聲電影真的給音樂人提供了很多工作崗位,所以第二題的答案應該是C選項To illustrate the huge demand for musicians during the silent-film era。

  同樣在題干中提到數字的還有TPO29 lecture4的第四題:

  According to the professor,what is the significance of having a satellite in orbit about 36,000 kilometers above Earth's surface?

  A. This is the physical limit of the length that a carbon nanotube cable could reach.

  B.A satellite orbiting at this height can remain directly above on location on Earth.

  C. Earth's gravitational field is too weak to hold a satellite in orbit at higher altitudes.

  D. The distance around Earth's equator is approximately 36,000 kilometers.

  題干中文到衛星在地球上方約36,000千米的高度環繞的意義是什么?在這篇文章中教授提出了一個要利用電梯運載物體到太空的想法,而電梯不會憑空轉動,需要用一個繩子掛起來,原文中提到elevators don’t just rise up. They have to hang on some kind of wire or track or something.

  教授提到這個材料也是阻止這一想法成為可能的阻礙。可喜的是目前有一種又輕又堅固的新型材料可以做到,那就是納米管:Uh, true. And for decades that’s exactly what’s prevented the idea from being feasible or even just taken seriously. Where do we find the material strong enough yet lightweight enough to act as a cable or track?

  這里第一遍提到了36,000 kilometers 這個數字,教授說I mean, we are talking 36,000 kilometers here. And the strain on the cablewould be more than most materials could bear.

  But a new material developed recently has a tensile strength higher than diamond, yet it’s much more flexible. I am talking about carbon nanotubes.

  學生又質疑了納米管是不是靠譜:OK. I’ve read something about carbon nanotubes.They are strong, all right, but aren’t they just very short little cylinders in shape?

  教授說: Ah, yes. But these cylinders cling together at a molecular level. You pull out one nanotube or row of nanotubes, and its neighbor’s come with it, and their neighbors, and so on. So you could actually draw out a 36,000-kilometer strand or ribbon of nanotubes stronger than steel, but maybe a thousandth the thickness of a human hair. 在這個部分教授第二遍提到36,000-kilometer這個數字。

  解決了材料的問題,電梯還需要一個支撐點啊,所以學生問到: OK. Fine. But what’s going to hold this ribbon up and keep it reach enough to support an elevator car?

  教授回答說電梯是肯定需要定住兩端的: Well, we definitely have to anchor it at both ends. So what we need is a really tall tower here on the ground right at the equator and a satellite ingeostationary orbit around the Earth. There’s a reason I mentioned that figure of 36,000 kilometers. 這里第三遍提到36,000 kilometers這個數字,因為我們需要在赤道附近建一個塔并且將另一端固定在一個和地球自轉相對靜止的衛星上,而這也是教授為什么會提到36,000 kilometers.這個數字的原因,所以在文中36,000 kilometers.這個數字出現了三遍,There’s a reason 是表示因果的信號詞,相信這兩點足以讓我們引起重視啦。該題的答案應該是 satellite orbiting at this height can remain directly above on location on Earth.

  這兩個例子都是以反復重復數字的方式來強調重要性的,而另一種更難的方式我們一起來看看為:以TPO15lecture的第三題為例:

  What does the professor imply about the researchers’ reaction to the biological community discovered on the ocean floor?

  A. They were surprised at the large variety of organisms living near hydrothermal vents.

  B. They were surprised to find any bacteria living without sunlight.

  C. They were disappointed at not finding any animal life.

  D. They could not agree on the significance of the data that they collected.

  題干中沒有直接提到數字,在文中也沒有反復提及數字,只是在學生問教授他們真的在這樣的環境下找到了生物?So you are telling us they did find organisms that could live under thoseconditions?

  教授回答:They did indeed, something like 300 different species,也就是說他們不但發現了生命還發現了多達300種,在文中這個300是有重讀的。所以該題的答案應該是A,They were surprised at the large variety of organisms living near hydrothermal vents.他們驚訝竟然在熱液噴口發現了大量的生物。

  由以上真題的案例我們可以得出結論,托福聽力中提到的具體數字是多少并不重要,如果當這個數字反復提及或重讀時我們應該引起重視,因為這個時候往往是出題的信號。

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