历史是一门研究往昔人类活动的科学。现实社会是历史的继续,社会的进步是同正确总结历史经验教训分不开的。现实可以借鉴历史。大的方面,历史经验影响到治国平天下的决策,如中国当前为什么要实行改革开放的方针,要回答这个问题,就要回顾历史。中国是在闭关自守中落后的,只有实行改革开放的方针,中国才能走上富强之路,才能较快地发展和进步。小的方面,具体到每一个部门,象工业、农业、交通运输、工程建设等等,也都要以史为鉴。如一个大的 History is a science that studies past human activities. The reality of society is the continuation of history. The progress of society is inseparable from the correct conclusion of historical experiences and lessons. Reality can learn from history. On the big side, historical experience has affected the decision-making process of governing the country. For example, why China currently adopts the policy of reform and opening up? To answer this question, we must review history. China is backward in its self-defense. Only by implementing the policy of reform and opening up will China be able to embark on the path of prosperity and strength so that it can develop and progress faster. Small areas, specific to each department, like industry, agriculture, transportation, construction and so on, also have to learn from history. As a big one