六级课程经典
零基础适用HOT
去试听
六级1对1
定制化
核心词 背词计划
0元
听力 提升必看
0元
阅读 冲刺200+
0元
写作 高分模板
0元
历年真题大全
免费
模考 水平测试
热门
1V1速成方案VIP
新东方在线英语六级频道为备考六级的同学整理了2019年12月大学英语六级阅读晨读美文:The History of Chemistry,希望可以为大家带来帮助,预祝大家高分通过大学英语六级考试,一起来练习吧。
The History of Chemistry
Chemistry did not emerge as a science until after the scientific revolution in the seventeenth century and then only rather slowly and laboriously. But chemical knowdedge is as old as history, being almost entirely concerned with the practical arts of living. Cooking is essentially a chemical process; so is the melting of metals and the administration of drugs and poisons. This basic chemical knowledge, which was applied in most cases as a rule of thumb, was nevertheless dependent on previous experiment. It also served to stimulate a fundamental curiosity about the processes themselves. New information was always being gained as artisans improved techniques to gain better results. The development of a scientific approach to chemistry was, however, hampered by several factors. The most serious problem was the vast range of material available and the consequent difficulty of organizing it into some system. In addition, there were social and intellectual difficulites, chemistry is nothing if not practical; those who practice it must use their hands, they must have a certain practical flair. Yet in many ancient civilizations, practical tasks were primarily the province of a slave population. The thinker or philosopher stood apart from this mundane world, where the practical arts appeared to lack any intellectual content or interest. The final problem for early chemical science was the element of secrecy. Experts in specific trades had developed their own techniques and guarded their knowledge to prevent others from stealing their livelihood. Another factor that contributed to secrecy was the esoteric nature of the knowledge of a alchemists, who were trying to transform base metals into gold or were concerned with the hunt for the elixir that would bestow the blessing of eternal life. In one sense, the second of these was the more serious impediment because the records of the chemical processes that early alchemists had discovered were often written down in symbolic language intelligible to very few or in symbols that were purposely obscure.
大学英语六级寒假全程班
本文关键字: 英语六级阅读
资料下载
2022年大选英语四级词汇完整带音标
发布时间:2020-04-15关注四六级小助手服务号
回复【过级词汇】获取
刘一男六级核心词汇完整版
发布时间:2020-04-15关注四六级小助手服务号
回复【过级词汇】获取
新东方英语口语终极教程word版
发布时间:2020-04-15关注四六级小助手服务号
回复【口语提升】获取
大学英语六级:练口语及单词lesson1-9
发布时间:2020-04-15关注四六级小助手服务号
回复【口语提升】获取
新东方在线[四六级王牌团队]典藏笔记
发布时间:2019-10-25关注四六级小助手服务号
回复【典藏笔记】获取
英语六级过级备考资料:经验+计划+语法
发布时间:2019-10-25关注四六级小助手服务号
回复【过级经验】获取
大学英语六级阅读解题经验技巧
发布时间:2019-10-25关注四六级小助手服务号
回复【阅读礼包】获取
英语四级写作诵读193经典句
发布时间:2019-10-25关注四六级小助手服务号
回复【写作指导】获取
英语六级听力讲义汇总资料
发布时间:2019-10-25关注四六级小助手服务号
回复【听力礼包】获取
英语六级口语考试练习小积累
发布时间:2019-10-25关注四六级小助手服务号
回复【口语提升】获取
大学英语六级核心高频词汇
发布时间:2019-10-25关注四六级小助手服务号
回复【过级词汇】获取
关注四六级小助手服务号回复【典藏笔记】获取
关注四六级小助手服务号,
获取学习资料
推荐阅读
更多>>新东方在线英语六级频道为备考英语六级的同学们整理了英语六级阅读精练,希望可以为大家带来帮助,一起来学习一下吧。 2022年6月大
2022年6月大学英语六级阅读精练50篇35:爱因斯坦轶事 英语六级阅读理解精炼第35篇,练习爱因斯坦轶事,含有六级阅读练习题,参考译
2022年6月大学英语六级阅读精练50篇34:缅怀林肯总统 英语六级阅读理解精炼第34篇,练习缅怀林肯总统,含有六级阅读练习题,参考译
2022年6月大学英语六级阅读精练50篇33:古埃及陵墓之谜 英语六级阅读理解精炼第33篇,练习古埃及陵墓之谜,含有六级阅读练习题,参
2022年6月大学英语六级阅读精练50篇32:女海盗的沉浮 英语六级阅读理解精炼第32篇,练习女海盗的沉浮,含有六级阅读练习题,参考译
专项提升公开课
更多>>136小时干货精讲,包邮3斤礼盒,无忧换课
价格 : ¥269
限报人数:1000人
随报随学 告别‘小聋瞎’
价格 : ¥0
限报人数:1000人
资料下载
更多>>关注四六级小助手服务号
回复【过级词汇】获取
关注四六级小助手服务号
回复【过级词汇】获取
关注四六级小助手服务号
回复【口语提升】获取
关注四六级小助手服务号
回复【口语提升】获取
关注四六级小助手服务号
回复【典藏笔记】获取
关注四六级小助手服务号
回复【过级经验】获取
关注四六级小助手服务号
回复【阅读礼包】获取
关注四六级小助手服务号
回复【写作指导】获取
关注四六级小助手服务号
回复【听力礼包】获取
关注四六级小助手服务号
回复【口语提升】获取
关注四六级小助手服务号
回复【过级词汇】获取
阅读排行榜
相关内容