Íê½áÈö»¨£¡
±¾ÒÔΪÁ½ÈýÕ¾ͽáÊøÁË£¬Ã»Ï뵽һдÓеã¶à£¬Ò»Ö±Íϵ½ÁËÏÖÔڲŸüС£
ÎÞÂÛÈçºÎ£¬±¾Êéµ½´Ë¾ÍÕýʽ½áÊøÁË£¬Õâ¸ö½á¾ÖÒ²ÊÇ´Ó×î³õ¾ÍÏëºÃµÄ¡£
лл´ó¼ÒÒ»Ö±ÒÔÀ´µÄÖ§³Ö£¬·Ç³£¸Ðл£¡
ÿһÕÅÍÆ¼öƱ¡¢ÔÂÆ±£¬Ã¿Ò»·Ý´òÉͶ¼ÊÇÎÒÄܼá³Öµ½ÕâÀïµÄ¶¯Á¦£¬ÕæµÄ·Ç³£¸Ðл¡£
Íê±¾¸ÐÑÔ(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ