Lesson 20 Snake poison 蛇毒 First listen and then answer the following question. 听录音，然后回答以下问题。 What are the two different ways in which snake poison acts? How it came about that snakes manufactured poison is a mystery. Over...
Lesson 17 A man-made disease 人为的疾病 First listen and then answer the following question. 听录音，然后回答以下问题。 What factor helped to spread the disease of myxomatosis? In the early days of the settlement of Australia, enterp...
Lesson 16 The modern city 现代城市 First listen and then answer the following question. 听录音，然后回答以下问题。 What is the author's main argument about the modern city? In the organization of industrial life the influence of the f...
Lesson 15 Secrecy in industry 工业中的秘密 First listen and then answer the following question. 听录音，然后回答以下问题。 Why is secrecy particularly important in the chemical industries? Two factors weigh heavily against the effec...
Lesson 14 The Butterfly Effect 蝴蝶效应 First listen and then answer the following question. 听录音，然后回答以下问题。 Why do small errors make it impossible to predict the weather system with a high degree of accuracy? Beyond two or...
Lesson 13 The search for oil 探寻石油 First listen and then answer the following question. 听录音，然后回答以下问题。 What do oilmen want to achieve as soon as they strike oil? The deepest holes of all made for oil, and they go down t...
Lesson 12 Banks and their customers 银行和顾客 First listen and then answer the following question. 听录音，然后回答以下问题。 Why is there no risk to the customer when a bank prints the customer's name on his cheques? When anyone op...
Lesson 11 How to grow old 如何安度晚年 First listen and then answer the following question. 听录音，然后回答以下问题。 What, according to the author, is the best way to overcome the fear of death as you get older? Some old people ar...
Lesson 10 Silicon valley 硅谷 First listen and then answer the following question. 听录音，然后回答以下问题。 What does the computer industry thrive on apart from anarchy? Technology trends may push Silicon Valley back to the future. Ca...
Lesson 8 Trading standards 贸易标准 First listen and then answer the following question. 听录音，然后回答以下问题。 What makes trading between rich countries difficult? Chickens slaughtered in the United States, claim officials in Bru...
