新视野大学英语视听说教程第3册答案(全)

Uint7 II. Basic Listening Practice Script M: Now we have satellite and high-powered microscope, it’s easy to think we know everything about the world; but we still don’t understand EI Nino. W: Right. Scientists all over the world over are even uncertain about the cause of the warm Pacific current that brings storms or drought—the mysterious EI Nino. Q: Which of the following is true according to the conversation? 2. Script M: Everyone is talking about environmental problem: acid rain, the green