Examination analysis: the basic knowledge of this examination. According to ancient legends, Shennong taught people to farm and produced primitive agriculture. Of course, primitive agriculture evolved from primitive gathering industry. So choose A. Dayu and Huang Didu are characters in ancient legends. Dayu was the last tribal leader in China. The Yellow Emperor is one of the ancestors of China and the earliest ancestor of mankind. Also known as the ancestor of China with Emperor Yan, he was born in (now Baoji) and was the leader of the ancient tribal alliance in China. Duke Zhou assisted Zhou Wang in formulating the system of rites and music. So BCD has nothing to do with primitive agriculture.
Comments: Students should know how primitive agriculture came from. It is necessary to master the characteristics of ancient agriculture, the evolution of production tools and other related knowledge points.