ÊÂÇéµÄÆðÒò£¬ÊÇijЩÎÞÁ¼µÄ×÷Õß¡¢¶ÁÕß¹ÊÒâÒýÕ½£¬Ìô²¦ÊÇ·Ç¡£
´ËÀàÈË£¬¼û²»µÃ±ðÈ˵ĺã¬ËùÒԾʹ×̳×Ó´òÆÆ£¬Ïë°ÑÊÂÇé¸ã´ó¡£
ºóÐø¾ÍÊÇ£¬Á½±¾Ê鶼ûʲôÎÊÌ⣬ÐÂÈËÊéдµÄºÃ£¬×÷ΪÔÚÆðµã¼æÖ°Ð´Á˼¸ÄêÎĵÄÀÏ×÷Õߣ¬ÎÒÊǷdz£Ö§³ÖºÍΪËý¸ßÐ˵ġ£
´ó¼Òϲ»¶µÄ£¬Ò²¿ÉÒÔÈ¥¿´¿´£¡
·îȰijЩ´ò×ÅÒýÕ½ÐÄ˼µÄ×÷Õß¡¢¶ÁÕߣ¬³ÃÔçÊÕÁËÐÄ˼»ØÈ¥¡£
ºóÐø(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ