並前往http://www3.ptgsh.ptc.edu.tw/sub/biology/ppt/%E5%85%B6%E4%BB%96/%E5%AF%92%E5%B8%B6%E9%87%9D%E8%91%89%E6%9E%97%E5%8F%8A%E8%90%BD%E8%91%89%E6%9E%97.ppt