Polypyrrole/polyvinylalcohol(PPy/PVA) foam was prepared by direct foam polymerization in water and then it was coated on the indium-tin oxide transparent conduc
教学过程StepⅠ.Warming up and revision 1.Sing a song from Module 2“I’m listening to music”and lead children to stand up to sing and do actions,meanwhile enjo
The phase shifts of the extinction and refractive index gratings to the illumination pattern are revealed in doped polymethyl methacrylate(PMMA).The dynamic pro