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  3. Chemistry did not emerge as: science until after the scientific revolution in 17th century and then only rather slowly and labor

Chemistry did not emerge as: science until after the scientific revolution in 17th century and then only rather slowly and labor

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问题     Chemistry did not emerge as: science until after the scientific revolution in 17th 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 aptitude. 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(炼金药). 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.
Which of the following statements best explains why "the second of these was the more serious impediment"(last sentence, Para. 3)?
选项 A、Chemical knowledge was limited to a small number of people.
B、The symbolic language used was very imprecise.
C、Very few new discoveries were made by alchemists.
D、The records of the chemical processes were not based on experiments.
答案A
解析 细节推理题。尾段尾句提到因为炼金术士知识的神秘性，他们还将研究成果记录于故意让人不懂的符号中，总的说来，这些都是由于化学知识局限于少数人的手里。故答案为A。
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