《大学化学实验》课程教学资源（教材讲义）原子吸收分光光度法测定水的硬度

广东医科大学：《临床生物化学及检验》课程教学资源（各章练习，含答案）第五章 自动生化分析技术

广东医科大学：《临床生物化学及检验》课程教学资源（各章练习，含答案）第一章 绪论

广东医科大学：《临床生物化学及检验》课程教学资源（各章练习，含答案）第四章 酶学检测技术

《大学化学实验》课程教学资源（教材讲义）硫酸亚铁铵的制备及产品中Fe2+含量的测定

《大学化学实验》课程教学资源（教材讲义）定pH滴定法测定甲酸乙酸混合酸中各组分含量

《大学化学实验》课程教学资源（教材讲义）三草酸合铁（III）酸钾的合成及组成测定

18.1 Paper is made of cellulose fibers Paper was first made HARDWOOD FIBERS in China as early as AD 100, of mulberry bark, and then introduced to Western world by Arabs in eighth century. The first paper mills were built in spain in 11th century

The atmosphere layer is very thin compared to the size of the Earth

The medicinal use of plants has been discovered more than 2000 years ago. Greek physician Dioscorides described the use of opium, in which morphine is the main component. In 1806, morphine was isolated from opium. In 1820, quinine was isolated from the bark of the cinchona tree