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 knowledge systematically. 参考答案:B 答案解析:[详细解答] 选项A的意思是“十七世纪的科学革命”,这只是在文章的第一段中提到了这一点;选项 B“化学作为一门学科发展缓慢的原因”,在文章的第二段和第三段中有重点讲述,故它是本题的正确答案;选项c“化