小编整理老托福考试听力PartC精选第75期,包括英文原文+音频,考生们不妨练习一下。更多托福备考信息尽在智课网托福频道!

  Since we've been discussing alternative fuels lately, I wanted to pass on to you some information I read about a new fuel that's been in the news a lot lately. It's called A-21. It's composed of water and a chemical known as naphtha. It seems to be a very promising fuel because it's much cleaner than the gasoline that we use today. That's not to say that it doesn't pollute, but it is cleaner. A-21 isn't like some other alternative fuels that require completely new types of engines. A-21 still works in regular, everyday combustion engines—like the ones in cars—with only minor mechanical modifications. So changing over wouldn't be a big deal. You may doubt some of these claims as many researchers have. Some people feared that because it contains about 45 percent water it would freeze in the winter. But a small amount of antifreeze was added to it, and that seems to have solved the problem. A-21 has recently undergone street tests in buses in Reno, Nevada. So far it seems to work just fine. This is a good thing, especially in Nevada, because the state government there has passed a law requiring that a large percentage of vehicles in Nevada run on alternative fuels. A-21 should help.

  【生词摘录】

  1. alternative: adj. 选择性的,二中择一的

  2. pass on: 传递

  3. naphtha: n. [C]石脑油

  4. promising: adj. 有希望的, 有前途的

  5. combustion: n. [C]燃烧

  6. modification: n.[C]更改,修改,修正

  7. claim: n. [C]声称,主张

  8. fear: v. 害怕,担心

  9. antifreeze: n. [C]防冻剂

  10. Reno: 里诺(美国有名的“离婚城市”, 在内华达州西部, 凡欲离婚者, 只须在该市

  住满三个月, 即可离婚)

  11. Nevada: 内华达州

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