【正确答案】 D

【答案解析】[听力原文]
   M: Good evening and welcome to Physics Today. Here we interview some of the greatest minds in physics as they help us to understand some of the most complicated theories. Today, I'm very pleased to welcome Dr. Melissa Phillips, professor of theoretical physics. She's here to tell us a little about what it is she studies. Dr. Phillips, you seem to study everything.
   W: I guess that would be fair to say, I spend most of my time studying The Big Bang Theory and where our universe came from.
   M: Can you tell us a little about that?
   W: Well, I'm very interested in why the universe exists at all. That may sound odd, but the fact is at the moment of the big bang, both matter and anti-matter were created for a short time, and I mean just a fraction of a second. The whole universe was a super-hot soup of radiation filled with these particles. So what's baffled scientists for so long is "why is there a universe at all?"
   M: That's because matter and anti-matter are basically opposites of each other. They are exactly alike, except that they have opposite electrical charges. So when they collide, they destroy each other?
   W: Exactly. So during the first few moments of the big bang, the universe was extremely hot and very small Matter and the now more exotic anti-matter would have had little space to avoid each other This means that they should have totally wiped each other out, leaving the universe completely barren.
   M: But a recent study seems to point to the fact, that when matter and anti-matter were first created, there were slightly more particles of matter, which allowed the universe we all live in to form? W: Exactly. Because there was slightly more matter, the collisions quickly depleted all the anti-matter and left just enough matter to create stars, planets, and eventually us.
   What does the man say is Physics Today?
从这篇对话的内容可以看出它是一篇访谈类的题材，而Physics Today就是这个访谈节目的名称。男士说这个节目是要采访一些物理上的杰出学者，从而帮助大家了解一些最复杂的理论，因此D项符合这个说法，为正确答案。
   上面已经说到了Physics Today是一个访谈节目，因此并非A项所说的是本杂志，也并非B项所说的是个入门课程，所以A项和B项都不选。C项“物理学家交流想法的场合”，从录音中的访谈形式可以看出节目采用主持人和物理学家一问一答的采访方式，并没有多个物理学家在一起交流想法，因此也不选C项。