托福聽力地質學材料難嗎 托福聽力地質學材料實例

      時間:2020-09-29 16:01:10 來源:作者:匿名

      導讀:本文是由匿名網友投稿,經過編輯發布關于"托福聽力地質學材料難嗎 托福聽力地質學材料實例"的內容介紹。

       小編在這里為大家推薦托福聽力地質學材料難嗎以及托福聽力地質學材料實例,希望能幫助到大家。

      托福聽力地質學材料難嗎 托福聽力地質學材料實例

       一、托福聽力地質學材料難嗎?

       1.詞匯困難。

       2.背景和內容,疏遠抽象。

       第一點和第二點原因非常簡單,我們在平時的學習過程中,除非選擇相關課程或對地質學感興趣的同學,否則很少聽到相關內容,地質學的學習本身也基于物理、化學、生物等學科,歷史、考古、環境學的交叉知識,理解起來比較困難。

       3.心情容易崩潰。

       這個問題也適用于天文、生物等學科,特別是說不知道的概念的時候。

       首先,托福沒有考察大家是否能學到這些知識點。這些概念作為語言類考試,其首要任務是測試其提供的信息,能否理解。也就是說,所謂的不行,人們說明。

       我們應該緊張的不是這個定義,而是內容是否遇到過。對方給出定義,我抓不住這個定義是什么。

       4.筆記本不能使用。

       地質學文章的內容是抽象的,如果背景知識不足,很難在短時間內一次理解,筆記的壓力也會增加。無法理解的部分只能通過筆記來增加記憶。如果我們整篇文章的結構難以把握的話,我會先抓住考試點,一般的四個主題也會解決。聽起來很混亂,做得很清楚。

       二、托福聽力地質學材料實例

       (1)

       Professor: That’s right. It’s one of the longest and deepest limestone caves not just in the country but in the world. Now, what else?

       Male Student: Well, it was formed because of sulfuric acid, right?

       Professor: That’s it. Yeah, what happens is you have deep underground oil deposits and there are bacteria. Here let me draw a diagram. Part of the limestone rock layer is permeated by water from below. Those curly lines are supposed to be cracks in the rock. Below the water table and rock is oil. Bacteria feed on this oil and release hydrogen sulfide gas. This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone. And when hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid, Ok? Sulfuric acid eats away at limestone very aggressively. So you get bigger cracks and then passageway is being formed along the

       openings in the rock and it’s all underground. Ah yes, Paul?

       (2)

       Sulfuric acid eats away at limestone very aggressively. So you get bigger cracks and then passageway is being formed along the openings in the rock and it’s all underground. Ah yes, Paul?

       Male Student: So that water... It’s not flowing, right? It’s still?

       Professor: Yes, so there are two kinds of limestone caves. In about 90 percent of them, you have water from the surface, streams, waterfall or whatever - moving water that flows through cracks found in limestone. It’s the moving water itself that wears away at the rock and makes passageways. Also, in surface water, there is a weak acid, carbonic acid, not sulfuric acid but carbonic acid that helps dissolve the rock. With a little help from this carbonic acid, moving water forms most of the world’s limestone caves. When I was

       researching this for a study a few years ago, I visited a couple of these typical limestone caves, and they were all very wet, you know, from streams and rivers. This flowing water carved out the caves and the structures inside them.

       (3)

       Yes, so there are two kinds of limestone caves. In about 90 percent of them, you have water from the surface, streams, waterfall or whatever - moving water that flows through cracks found in limestone. It’s the moving water itself that wears away at the rock and makes passageways. Also, in surface water, there is a weak acid, carbonic acid, not sulfuric acid but carbonic acid that helps dissolve the rock. With a little help from this carbonic acid, moving water forms most of the world’s limestone caves. When I was researching this for a study a few years ago, I visited a couple of these typical limestone caves, and they were all very wet, you know, from streams and rivers. This flowing water carved out the caves and the structures inside them.

       Male Student: But not Lechuguilla?

       Professor: Dry as a bone. Well, that might be a bit of an exaggeration. But it’s safe to say that it’s sulfuric acid and not moving water that formed Lechuguilla cave and those few other ones like it. In fact, there is no evidence that flowing water has even gone in or out of the

       cave. So, it’s like a maze. You have passageways all around. There are wide passages, narrow ones at all different depths, like underground tunnels in the limestone.

       小編為大家整理這些托福聽力地質學材料難嗎 托福聽力地質學材料實例,希望能幫助到大家。

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