摘要: 英文文本 Porpoises First listen and then answer the following question.What would you say is the main characteristic of porpoises？ There has long been a superstition among mariners that porpoises[阅读全文:]
摘要: 英文文本 The stuff of dreams First listen and then answer the following question.What is going on when a person experiences rapid eye-movements during sleep？ It is fairly clear that sleeping perio[阅读全文:]
摘要: 英文文本 Snake poison First listen and then answer the following question.What are the two different ways in which snake poison acts？ How it came about that snakes manufactured poison is a mystery[阅读全文:]
摘要: 英文文本 William S. Hart and the early 'Western' film First listen and then answer the following question.How did William Hart's childhood prepare him for his acting role in Western films？ Willi[阅读全文:]
摘要: 英文文本 Knowledge and progressFirst listen and then answer the following question.In what two areas have people made no 'progress' at all？ Why does the idea of progress loom so large in the mode[阅读全文:]
摘要: 英文文本 Bird flight First listen and then answer the following question.What are the two main types of bird flight described by the author？ No two sorts of birds practise quite the same sort of f[阅读全文:]
摘要: 英文文本 Beatuy First listen and then answer the following question.What do glimpses of beauty， either in nature or art， often suggest to the human mind？ A young man sees a sunset and， unable[阅读全文:]
摘要: 英文文本 Non-auditory effects of noise First listen and then answer the following question.What conclusion does the author draw about noise and health in this piece？ May people in industry and t[阅读全文:]
摘要: 英文文本 The past life of the earth First listen and then answer the following question.What is the main condition for the preservation of the remains of any living creature？ It is animals and pla[阅读全文:]