Ã÷ÌìÕýʽ´ÇÖ°À²£¡
Èç±êÌâËù˵£¬Ôٸɼ¸Ì죬°ËÔ¶þºÅ×óÓÒÎҾͳÉΪ¹âÈٵġ®ÎÞÒµÓÎÃñ¡¯ÁË¡£»¹Çë´ó¼Ò¶à¶àÖ§³Ö£¬±Ï¾¹ÔÚ¼ÒÈËÃæÇ°¿äϺ£¿Ú£¬Ëµ²»¸É»î¶¼ÄÜÑø»î×Ô¼º£¬ÒªÊÇÒ»¸öÔ²»µ½ÔÙÈ¥ÕÒ¹¤×÷¾ÍÌ«¶ªÁ³ÁË¡£
Õ⼸Ìì½»½ÓÈÎÎñÍâ¼Ó¼ÒÀï×°ÐÞ£¬ËùÒÔûÄܸüУ¬´Ó°ËÔÂÒ»¿ªÊ¼ÎÒ»á°ÑÒÔǰǷµÄÕ¶¼²¹»ØÀ´£¬ÕùÈ¡¹ýÄêÍê½á¿ªÐÂÊé¡£
Ã÷ÌìÕýʽ´ÇÖ°À²£¡(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ