职称英语理工类阅读原文版模拟第2篇1

1、职称英语理工类阅读原文版模拟第2篇1阅读下面的短文。每篇短文的后面有五个问题，每个问题有四个 备选答案。请根据短文的内容选择答案。每个试题计3分，共计15分Flying the Hypertl SkiesA little airplane has given new meaning to the term ngoing hyperThe Hyper-X2 recently broke the record for air-breathing jet planes when it traveled at a hypersonic speed of seven times the speed of

2、 sound .Thats about 5,000 miles per hour At this speed f youd get around the world flying along the equator in less than 5 hours The Hyper-X is an unmanned z experimental aircraft just 12 feet long . It achieves hypersonic speed using a special sort of engine known as a scramjet3 . It may sound like

3、 something from a comic book z but engineers have been experimenting with scramjets since the 1960s For an engine to burn fuel and produce energy , it needs oxygen .Ajet engine Jike those on passenger airplanes , gets oxygen from the air . A rocket engine typically goes faster but has to carry its o

4、wn supply of oxygen A scramjet engine goes as fast as a rocket f but it doesrft have to carry its own oxygen supply A scramjets special design allows it to obtain oxygen from the air that flows through the engine And it does so without letting the fast-moving air put out the combustion flames Howeve

5、r, a scramjet engine works properly only at speeds greater than five times the speed of sound . A booster rocket carried the Hyper-X to an altitude of about 100,000 feet for its test flight . The aircrafts record-beating flight lasted just 11 seconds Although the little planes self-powered flight la

6、sted only 11 sec onds ,that brief journey on March 27 makes a major milestone on the way to a new breed of very fast airplanes , comments Werner J A . Dahm of the University of Michigan in Ann Arbor4 . In the future z engineers predict z airplanes equipped with scramjet engines could transport cargo

7、 quickly and cheaply to the brink of space Such hypers on ic jets could pote ntially carry passe ngers anywhere in the world in just a few hours .Out of the three experimental Hyper-X aircrafts built for NASA5 z only one is now left The agency has plans for anothersecond hypersonic flight , this tim

8、e at 10 times thespeed of the sound 词汇率 uN!q/|U!q 辆-u/usdis&qguJsi/uoiisnquioD皿備Z确爭-u/ngv:g|s/o6jeo竿刃吹给渤團昱露 u/e/pujv|ss/珂uueas聊pg 2poesooq 阴丫主 fpe/puvLugu/pauueiuun制哥击 u/un3；s|ieujg/9uo|s9|!uj爲垩 u /(j)3；i9/v(gi/joienbm開荊無 u/ys:nqs/ja;sooqfpe/iujsgOgdieq/oiuosjadXq备注说明,非正文，实际使用可删除如下部分。本内容仅给予阅读编辑指点：1、

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