栏目广告位一 |
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新概念英语听力mp3下载第四册lesson 25 Non-auditory effects of noise
Many people in industry and the Services, who have practical experience ofnoise, regard any investigation of thi
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 26 The past life of the earth
It is animals and plants which lived in or near water whose remains are mostlikely to be preserved, for one of t
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 23 Bird flight
No two sorts of birds practise quite the same sort of flight; the varieties are infinite,but two classes may be
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 24 Beauty
A young man sees a sunset and, unable to understand or to express the emotionthat it rouses in him, concludes th
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 21 William S. Hart and the early ‘Western
William S. Hart was, perhaps, the greatest of all Western stars, for unlike GaryCooper and John Wayne he appeared in n
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 22 Knowledge and progress
Why does the idea of progress loom so large in the modern world ? Surely becauseprogress of a particular kind is
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 19 The stuff of dreams
It is fairly clear that the sleeping period must have some function, and becausethere is so much of it the funct
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 20 Snake poison
How it came about that snakes manufactured poison is a mystery. Over theperiods their saliva, a mild, digestive
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 17 A man-made disease
In the early days of the settlement of Australia, enterprising settlers unwiselyintroduced the European rabbit. This r
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 18 Porpoises
There has long been a superstition among mariners that porpoises will savedrowning men by pushing them to the surface,
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 15 Secrecy in industry
Two factors weigh heavily against the effectiveness of scientific in industry.One is the general atmosphere of s
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 16 The modern city
In the organization of industrial life the influence of the factory upon the physiological and mental state ofth
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 13 The search for oil
The deepest holes of all are made for oil, and they go down to as much as 25,000feet. But we do not need to send
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 14 The Butterfly Effect
Beyond two or three days, the world’s best weather forecasts are speculative, and beyond six or seven theyare w
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 11 How to grow old
Some old people are oppressed by the fear of death. In the young there is a justification for this feeling.Young
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 12 Banks and their customers
When anyone opens a current account at a bank, he is lending the bank money, repayment of which hemay demand at
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 9 Royal espionage
Alfred the Great acted as his own spy, visiting Danish camps disguised as aminstrel. In those days wandering minstrels
新概念英语听力mp3下载第四册2007-03-21 -
*新概念英语听力mp3下载第四册lesson 10 Silicon valley
Technology trends may push Silicon Valley back to the future. Carver Mead, a pioneer in integrated circuitsand a profe
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 7 Bats
Not all sounds made by animals serve as language, and we have only to turn tothat extraordinary discovery of ech
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新概念英语听力mp3下载第四册lesson 8 Trading standards
Chickens slaughtered in the United States, claim officials in Brussels, are not fit to grace European tables. No,say t
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 5 Youth
People are always talking about' the problem of youth '. If there is one--whichI take leave to doubt--then it is older
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 6 The sporting spirit
I am always amazed when I hear people saying that sport creates goodwill betweenthe nations, and that if only the comm
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 3 Matterhorn man
Modern alpinists try to climb mountains by a route which will give them goodsport, and the more difficult it is, the m
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 4 Seeing hands
In the Soviet Union several cases have been reported recently of people whocan read and detect colours with thei
新概念英语听力mp3下载第四册2007-03-21 -
新概念英语听力mp3下载第四册lesson 1 Finding Fossil man
Lesson 1 Finding Fossil manWe can read of things that happened 5,000 years ago in the Near East, wherepeople first lea
新概念英语听力mp3下载第四册2007-03-21
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