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最佳答案。每个试题计3分,共计15分。
A little airplane has given new meaning to the term going hyper.
The Hyper-X is an unmanned,experimental aircraft just 12 feet long. It achieves hypersonic speed using a special sort of engine known as a scramjet3.It may sound like something from a comic book,but engineers have been experimenting with scramjets since the 1960s.
Out of the three experimental Hyper-X aircrafts built for NASA5,only one is now left.The agency has plans for another 11-second hypersonic flight,this time at 10 times the speed of the sound.
hypersonicadj.超音速的 boostern.助推器
unmannedadj.无人的 booster rocket 助推火箭5skrAmdVet5kB:^Eup
喷气发动机
练习:
A it was the first air-breathing jet plane.
C it flew at speeds smaller than five times the speed of sound.
2. What kind of an engine did the Hyper-X use?
B A scramjet engine that doesnt carry its own oxygen supply.
D A iet engine that uses no oxygen.
A It goes slower than a rocket.
C It works only at speeds greater than five times the speed of sound.
4. What did Werner J.A.Dahm of the University of Michigan say about the Hyper-X test flight?
B It was self-powered,so it lasted only 11 seconds.
D It is a major milestone in the journey of making a new type of very fast airplanes,
A To make another 11-second hypersonic flight at 10 times the speed of the sound.
C To retest the aircraft that is left.
答案与题解:
2. B 第四段讲了三种发动机的氧气喷气式发动机是从空气中汲取氧气,火箭发动机必须自携氧气,而超音速冲压喷气发动机则不必白携氧气,而这正是Hyper-X使用的发动机装置。
4. D 文章的第六段中,密歇根大学的研究人员Werner J.A.Dahm说,Hyper-X的试飞成功只是研制一种新式快速飞机过程中的一个里程碑,而不是新型飞机的诞生。所以,D是正确选择,A是错误选择。B也不是Werner J.A.Dahm想要表达的意思。C是其他下程师而不是Werner J.A.Dahm说的话。
句型宝典之含助动词句1
英语写作必背200句4
大学生常见的十大语法错误
三十五个经典句型帮你写作过关
句型宝典2
句型宝典之含不定词句4
各种强调句用法一览
句型宝典否定句型2
句型宝典含分词句3
句型宝典之含助动词句2
句型宝典之含不定词句5
句型宝典否定句型12
句型宝典否定句型4
句型宝典之含不定词句3
备忘录概述
句型宝典之比较句五
英语写作中的拦路虎
虚拟语气十八例及练习
句型宝典之含代名词句3
句型宝典之含关系词句4
句型宝典含动名句2
句型宝典之比较句四
句型宝典之含关系词句1
句型宝典之含助动词句3
英文标点符号的使用2
与环境保护有关的词汇
有效提高你的写作水平—15个经典英语句型
句型宝典否定句型3
句型宝典否定句型11
句型宝典否定句型7
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |