化学作为一门精确的自然科学,虽然只有200多年的历史,然而从远古时代,人类在实践活动中就应用了各种化学反应。树木和其他可燃物质的燃烧,是人类最先掌握的化学反应。利用篝火取暖以及学会制造熟食,在人类文明的发展中都起了巨大的作用。后来,大的利用又导致多种手工工艺的出现。在这些手工工艺 As a precise natural science, chemistry has only 200 years of history. However, from the ancient times, mankind used various chemical reactions in practice. The burning of trees and other flammable substances is the first chemical reaction human beings control. The use of bonfire heating and learning to make cooked food have all played a huge role in the development of human civilization. Later, the large use led to the emergence of a variety of handcrafts. In these craftsmanship