我们中华民族在人类文明史上,曾创造过光辉灿烂的科学文化,涌现出了许多科学家、发明家。西汉有名的农业科学家赵过,就是其中的一个。赵过的家世、籍贯及生卒年代都不可考。根据《汉书·食货志》载,赵过的主要活动是在汉武帝末年。那时,由于战争的频繁,统治阶级的奢侈挥霍,原来丰盈的府库变得空虚了,人民生活困苦,关东流民与日俱增,农民起义不断暴发,他们“攻城邑,杀郡守,充满山谷,吏不能禁”面临如此严重局面,统治阶级不得不采取一些缓和社会危机的措施。为 In the history of human civilization, we, the Chinese nation, have created brilliant science and culture and many scientists and inventors have emerged. Zhao Guo, a well-known agricultural scientist in the Western Han Dynasty, is one of them. Zhao’s family background, birthplace and age are not allowed to test. According to “Han Shi Hui Zhi” contains, Zhao’s main activity is in the late Emperor Wudi. At that time, due to the frequent warfare and extravagance of the ruling class, the original treasured treasury became emptiness, the people lived in poverty, the population in the Kanto increased daily, and the peasant uprisings continued to explode. They “attacked the cities, killed counties, filled valleys, Officials Must Not Forbid ”In such a serious situation, the ruling class has to take some measures to ease the social crisis. for