首页
登录
职称英语
Chemistry did not emerge as a science until after the scientific revolution
Chemistry did not emerge as a science until after the scientific revolution
游客
2023-11-23
44
管理
问题
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 knowledge 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 potions. 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 difficulties, 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 tile knowledge of 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. [br] The underlined word "it" refers to which of the following?
选项
A、Problem.
B、Material.
C、Difficulty.
D、System.
答案
B
解析
做这类题目时,要特别注意该代词前面的名词短语或从句。一般来说,这类题目的答案都能在同一句话的主语或宾语,或者在前一句话的主语和宾语中找到。仔细阅读完前面的句子后,我们可以得知这里it指的是material。
转载请注明原文地址:https://tihaiku.com/zcyy/3211196.html
相关试题推荐
ThescientificnameistheHoloceneAge,butclimatologistsliketocallour
ThescientificnameistheHoloceneAge,butclimatologistsliketocallour
[originaltext]J:Becausein1987theDepartmentofEducationandScienceestabl
[originaltext]J:Becausein1987theDepartmentofEducationandScienceestabl
[originaltext]J:Becausein1987theDepartmentofEducationandScienceestabl
IseenoconflictinwhattheBibletellsmeaboutGodandwhatsciencetel
IseenoconflictinwhattheBibletellsmeaboutGodandwhatsciencetel
IseenoconflictinwhattheBibletellsmeaboutGodandwhatsciencetel
IseenoconflictinwhattheBibletellsmeaboutGodandwhatsciencetel
IseenoconflictinwhattheBibletellsmeaboutGodandwhatsciencetel
随机试题
MrFielder[br]ThesuccessofBorgWarnerliesin[originaltext]At63,Joh
WhichofthefollowingtagquestionsisINCORRECT?A、There’snohopeforit,ist
Aladywasreportedinthenewspaper______nearthepoliceofficeyesterday.A、bei
A.0,γ B.0,2γ C.γ,γ D.γ,2γ
能够种植粟,制造彩陶,居住在半地穴式房子里的原始居民是()。A.元谋人B.北
(2019年5月)工时定额和产量定额是劳动定额的两种基本表现形式,它们在数值上互
下列哪项不属于“十八反”的药物A.甘草反甘遂 B.乌头反贝母 C.莱菔子反人
下列公式中正确的有( )。A.有形净资产=所有者权益+无形资产 B.利息保障
绘制双代号网络图时,符合节点编号的原则是( )。A.不应重复编号 B.可以随机
根据《建筑安装工程费用项目组成》(建标[2013]44号文),以定额人工费为基
最新回复
(
0
)