I’ve listened to Professor Smith’s talk about medicine,but I still haven’t got a good understanding of its key .
A. notes
B. information
C. words
D. points
网友回答
A. notes
B. information
C. words
(答案→)D. points
解析:此处point意为“(思想、议论等的)要点”。notes笔记;information信息;words话语。