°´¼üÅÌÉÏ·½Ïò¼ü ¡û »ò ¡ú ¿É¿ìËÙÉÏÏ·ҳ£¬°´¼üÅÌÉ쵀 Enter ¼ü¿É»Øµ½±¾ÊéĿ¼ҳ£¬°´¼üÅÌÉÏ·½Ïò¼ü ¡ü ¿É»Øµ½±¾Ò³¶¥²¿£¡
¡ª¡ª¡ª¡ªÎ´ÔĶÁÍꣿ¼ÓÈëÊéÇ©ÒѱãÏ´μÌÐøÔĶÁ£¡
D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D±¾ÎĶÀ¼Ò·¢±íÓÚ½ú£ü½ÎÄѧ³Ç
67¡£chapter¡¡67£¨£©¡¡
omom
¡¡¡¡¡¡¡¡±¾ÎĶÀ¼Ò·¢±íÓÚ½ú£ü½ÎÄѧ³Ç¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D±¾ÎĶÀ¼Ò·¢±íÓÚ½ú£ü½ÎÄѧ³Ç
68¡£chapter¡¡68£¨£©¡¡
omom
¡¡¡¡¡¡¡¡±¾ÎĶÀ¼Ò·¢±íÓÚ½ú£ü½ÎÄѧ³Ç¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨D¨