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. 1. 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. 3. 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. 5. What has NASA planned to do? B To make three more Hyper-X experiments. D To make the aircraft fly higher and longer. 1. 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。 3. 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。 5. A 答案可在最后一段找到。
2015年综合类A级职称英语词汇选项练习题(1)
职称英语考试综合类B级词汇必备练习题(5)
综合类职称英语B级考试词汇选项题精讲(3)
语法词汇职称英语综合类考试:语法讲义(3)
综合类2015年职称英语考试词汇经典练习(5)
语法词汇职称英语考试综合类语法(5)
综合类职称英语考试A级重点单词(3)
综合类职称英语B级考试词汇选项题精讲(1)
职称英语考试综合类B级词汇必备练习题(1)
职称英语考试综合类B级词汇必备练习题(3)
职称英语综合类C级考试词汇精编(5)
职称英语综合类词汇复习:固定搭配150组(121~150)
语法词汇综合类职称英语考试辅导(2)
职称英语考试综合类A级词汇选项练习(5)
2015年综合类A级职称英语词汇选项练习题(5)
综合类职称英语B级考试词汇选项题精讲(5)
职称英语综合类C级考试词汇精编(1)
2015年综合类A级职称英语词汇选项练习题(4)
语法词汇综合类职称英语考试辅导(4)
职称英语综合类词汇复习:固定搭配150组(41~70)
职称英语综合类词汇复习:固定搭配150组(71~100)
语法词汇职称英语考试综合类语法(4)
综合类职称英语B级考试词汇选项题精讲(2)
2015年职称英语综合类A级考试单词复习(2)
2015年职称英语综合类B级词汇选项练习(2)
职称英语考试综合类B级词汇必备练习题(4)
2015年职称英语综合类A级考试单词复习(3)
语法词汇综合类职称英语考试辅导(1)
2015年职称英语综合类A级考试单词复习(1)
职称英语考试辅导:综合类C级近义词推荐(5)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |