[单项选择]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 knowledge systematically.

最新试题

• ●    [单选题]有关肾上腺皮质描述错误的是
• ●    [多选题]跨区域灭火救援行动中，参战的（）在消防灭火救援指挥部的统一领导下实行本系统内的纵向逐级指挥
• ●    [单选题]新月体性肾小球肾炎的病变特点是
• ●    [判断题]液力变矩器的泵轮是从动件,与发动机曲轴同步转动。( )
• ●    [多选题]按照获得测量结果的方式分类包括(____)。
• ●    [单选题]防止空气预热器低温腐蚀的最根本的方法是（）