Accessories For Wigs,Wig Products And Accessories,Hair Wig Accessories,Wig Hair Accessories,Hair Accessories For Wigs China Xuchang Wig Co., Ltd , https://www.hairxuchang.comP.E. Elective Six 4.1 "Research on the Nature of Matters" ppt 1. Recognize the role of chemistry experiments in learning and research chemistry 2. Have a sense of safety and can successfully complete chemistry experiments 3. Can find meaning in learning and production, life Chemical problems, and carry out experimental explorations 4. Can design experimental solutions to solve chemical problems according to specific conditions, and evaluate and optimize them