1¡¢ÏÂÁи÷½ÇÖÐÓë ÖÕ±ßÏàͬµÄÊÇ£¨ £© a£® b£® c£® d£® 2¡¢ £¨ £© a£® b£® c£® d£® 3¡¢ÒÑÖª £¬Ôò £¨ £© a£® b£® c£® d£® 4¡¢º¯Êý µÄͼÏó£¨ £© a£®¹ØÓÚµã ¶Ô³Æ b£®¹ØÓÚÖ±Ïß ¶Ô³Æ c£®¹ØÓÚµã ¶Ô³Æ d£®¹ØÓÚ Öá¶Ô³Æ 5¡¢º¯Êý µÄÖÜÆÚΪ£¨ £© a£® b£® c£® d£® 6¡¢º¯Êý µÄµ¥µ÷ÔöÇø¼äΪ£¨ £© a£® b£® c£®