答案：B D

题型分类：主旨题

音频对应：

定位点1:

Actually, you already knew music has an influence on human's feeling in many ways before ever coming to this class. However, I'd like focus on "how to do this" today. Actually, it's the thing about humans.

定位点2:

Okay, now let's take a look at how people made sounds, I mean music. Apparently, music has been important to people since a very, very long time ago.

解析：在定位点1，教授明确，今天讲音乐如何作用于人类。在讲座前半部分，教授主要讲音乐如何作用于人类的大脑，对应B选项。

在讲座后半部分，也就是从定位点2开始，教授讲音乐在历史上对人类的重要性，对应D选项。