人们常常把历史比喻成是一条奔流不息的河。绵延流长的中国历史,用5000年量定,似乎都嫌保守。为了学习和研究的方便,学者们将其划分为不同的断代,每一个断代都有其承上启下的作用和影响,而这种作用和影响是由该断代的历史特点决定的,这些特点无疑成为这段历史的主干知识点,成为人们学习和研究这段历史时关注的重点所在。 People often compare history to a flowing river. The long history of China, measured in 5000, seems too conservative. For the convenience of study and study, scholars divide it into different dynasties. Each dynasty has its own function and influence, which is determined by the historical features of the dynasty. These characteristics undoubtedly become the The main point of history knowledge, as people learn and study the history of the focus of attention.