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5.Q: What are the two speakers talking about? A) A prediction of the future of mankind. B) A new drug that may benefit mankind. C) An opportunity for a good job. D) An unsuccessful experiment. 6.Q: What does the man mean? A) A lesson requires students active involvement. B) Students usually take an active part in a lecture. C) More knowledge is covered in a lecture. D) There is a larger group of people interested in lessons. 听力原文： 5.M: I must point out that trials of new medicine are expensive and you can never guarantee success. W: But there s a very good chance in this case. I do hope you ll go ahead in the view of the potentialbenefit to mankind. Q: What are the two speakers talking about? 6.W: What s the difference between a lesson and a lecture? M: Well, they are both ways of imparting knowledge. But the main difference is that youparticipate in a lesson whereas you just listen to a lecture. A lecture is generally given to a much larger group. Q: What does the man mean? 译文与解析： 5.男：我必须要指出，新药品的试验非常昂贵，而且你从未保证成功。 | 
