托福听力真题原文+题目+答案+mp3下载：natural gas

托福听力真题原文+题目+答案+mp3下载：natural gas

P: OK. Let's continue our discussion of natural gas. In class yesterday, we said that it is now widely considered to be the fossil fuel of the future, or at least of the next 50-100 years or so. Anybody remembers why? Jane?

J: Um ... it's probably because it's a lot more plentiful than oil, right? And…it doesn't produce as much carbon when it's burned.

P: Great! lt actually emits very little carbon into the air. So it forms much less carbon dioxide in the atmosphere. And that's because it's a gas. You see, it efficiently converts its energy content to power ... um ... much more efficiently than your conventional fossil fuel because gas burns more completely. And also, it goes a lot further in terms of what it can be used for. It can be used to generate electricity, heat homes, run cars... Also proven reserves of methane which is the most important ingredient in natural gas have increased tremendously for the past few years as the exploration goes on. We estimate that just... just taking the reserves we know about... it cantlast for about a hundred years, some say even longer. So, what do you think? Pretty promising, right? Um  clean burning, multi-purpose and plentiful supply. But, what's the drawback? Tom?

T: Well, methane itself is a greenhouse gas, isn't it? So if it'd find its way into the atmosphere ...

P: Right. It couid be a contribution to the greenhouse effect in a big way. Um ... what else?

J: lt',s explosive.

T: And it stinks! [students laughing]

。。。。。余下听力真题原文省略！

听力真题题目如下：

1. What is the lecture mainly about?

(A) New technologies for mining natural gas on the ocean floor

(B) Evidence that natural gas is safer than other fossil fuels

(C) A possible source of natural gas

(D) The similarities between natural gas and other fossil fuels

2. According to the professor, what are two ways in which natural gas is preferable to oil and other fossil fuels? Click on two answers.

(A) It can be extracted more easily.

(B) It burns more cleanly.

(C) It is more versatile.

(D) It is safer to transport.

。。。。。余下托福听力真题题目及答案省略！

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