重要提示：
请勿将账号共享给其他人使用，违者账号将被封禁！
题目
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 the 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.
What is the passage mainly about？
A．The scientific revolution in the seventeenth century.
B．Reasons that chemistry developed slowly as a science.
C．The practical aspects of chemistry.
D．Difficulties of organizing chemical knowledge systematically.
更多“Chemistry did not emerge as a science until after the scientific revolution in the sevente”相关的问题
第1题
【C1】
A．parts
B．areas
C．regions
D．classes
第2题
Rather than taking the final then, what they did was to find Professor Aldric after the final and explain to him why they missed the final. They told him that they went up to UVA for the weekend, and had planned to come back in time to study，but they had a flat tire (爆胎）on the way back and didn’t have a spare and couldn’t get help for a long time and so were late getting back to campus.
Aldric thought this over and then agreed that they could make up the final on the following day. The two guys were overjoyed and relieved. So, they studied that night and went in the next day at the time that Aldric had told them. He placed them in separate rooms and handed each of them a test booklet and told them to begin.
They looked at the first problem, which was something simple about free radical formation and was worth 5 points. “Cool，" they thought, “this is going to be easy. " They did that problem and then turned the page. They were unprepared, however, for what they saw on the next page. It said: (95 points) Which tire was flat？
The two students decided to visit their friends at the weekend beacause_______
A.they didn’t want to take the exam
B.they were invited by their friends
C.they were not worried about the exam at all
D.they forget the arrangement of the final exam
They didn’t return as planned because_______.A.they got lost on their way back
B.they slept beyond the time to come back
C.their car broke down on their way back
D.they couldn’t get help when they were in difficulty
How did the Professor arrange the make-up exam？A.He made the exam booklet very long.
B.He gave them different exam papers.
C.He asked a very surprising question.
D.He gave them very limited time to finish the paper.
When they took the first glance at the exam booklet, they thought_______.A.it was easy
B.it was too much
C.it was too difficiult
D.it was reasonable
It can be inferred from the passage that_______.A.the students didn’t like Professor Aldric
B.the two students had difficulties in their studies
C.Professor Aldric was very clever and humorous
D.the two students would surely pass the make-up exam
请帮忙给出每个问题的正确答案和分析，谢谢！
第4题
A.machine
B. headache
C. chemistry
D. character
第10题
A.difficult
B.is difficult
C.it is difficult
D.that is difficult
相关内容
Chomsky defines“competence” as the ideal user's （) of the rules of his language.
（) is the smallest meaningful unit of language.
In linguistics research, both （) and （) approaches are preferred.
Language is distinguished from traffic lights in that the former has the designing fea
Language is a means of verbal communication. It is （) in that communicating by speakin
（) is a design feature of human language that enables speakers to talk about a wild ra
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“赏学吧”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
