A.Ⅱ、ⅢB.Ⅰ、ⅡC.Ⅰ、Ⅲ、ⅣD.Ⅰ、Ⅱ、Ⅲ、Ⅳ
A.The Paleolithic Period.B.The Neolithic Period.C.The Yellow Emperor Times.D.The Shennong Family.