Flying the Hypert1 Skies
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.
The Hyper-X broke the record because
B it flew along the equator.
D it traveled at a supersonic speed.
A A jet engine that gets oxygen from the air.
C A rocket engine that carries its own supply of oxygen.
What is NOT true about the scramjet engine?
B It extracts oxygen from the air that flows through the engine.
D It doesnt carry its own oxygen supply.
A It indicated the birth of a very fast airplane.
C It can transportcargo quickly and cheaply to the brink of space.
What has NASA planned to do?
B To make three more Hyper-X experiments.
D To make the aircraft fly higher and longer.
C Hyper-X之所以打破纪录是因为它的飞行速度是音速的7倍。它不是第一架空气喷气式飞机,也不是第一架超音速飞机,所以A和D都不对。Hyper-X的试飞并未绕赤道飞行,所以B也是错误的选择。
A 根据第五段内容,B、C、D都是正确的说法。第四段最后一句告诉我们,A的说法是不正确的。
A 答案可在最后一段找到。
雅思阅读考试有哪些注意事项?
雅思阅读考试复习指南(2)
雅思阅读文章(金星凌日)解析及答案
雅思阅读的疑难杂症该如何应对?
雅思考试的雅思阅读五大题型解析及趋势
雅思阅读练习:药物研究失败的因素
雅思阅读各题型的解题技巧:简答题
雅思阅读考试的备考技巧
实例讲解雅思阅读单选题答题技巧
雅思阅读List of Headings和Summary题型的解析方法
雅思阅读段落标题题的答题步骤
雅思阅读材料:美国最佳15项工作出炉
雅思阅读考试的四个做题步骤
雅思阅读高分四大绝招
雅思阅读实战训练模拟试题(一)
雅思阅读中的8个常见关系词
了解雅思阅读中的定位词
雅思阅读材料:提升工作快乐程度的秘诀
雅思阅读辨别正误题的解题步骤
解析雅思阅读中的动植物话题
剖析雅思阅读文章结构:自然科学篇
雅思阅读文章(苏联劳动时间的变化)解析及答案
雅思阅读文章(提炼饮用水)解析及答案
雅思阅读练习的7大重点帮你提高效率
雅思阅读考试备考指导
雅思阅读考试复习指南(3)
雅思阅读对雅思写作思路的借鉴意义
雅思阅读文章(竹子)解析及答案
雅思阅读题型介绍及做题顺序
雅思阅读观点题解析方法指导
| 不限 | 
| 英语教案 | 
| 英语课件 | 
| 英语试题 | 
| 不限 | 
| 不限 | 
| 上册 | 
| 下册 | 
| 不限 |