neural\n20.ppt ......\n21.ppt ......\n210.ppt ......\n211.ppt ......\n212.ppt ......\n213.ppt ......\n22.ppt ......\n23.ppt ......\n24.ppt ......\n25.ppt ......\n26.ppt ......\n27.ppt ......\n28.ppt ......\n29.ppt ......\y21.wav ......\y22.wav ......\y23.wav ......\y24.wav neural