·µ»Ø

ÏÉÓûåÐÒ£

Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
ÉϼÜÁË£¬ÎÒ˵Á½¾ä£¡(1/2)
   ´æÊéÇ© Êé¼Ü¹ÜÀí ·µ»ØÄ¿Â¼
¸÷λÊéÓÑ£¬Ð»Ð»ÄãÃÇÒ»Ö±ÒÔÀ´µÄÖ§³Ö£¬ÊéÉϼÜÁË¡£ÎÒÖªµÀÕâÊéµÄ³É¼¨ºÜ²î£¬ËäÈ»ÉêÇëÁË×ÔÖ÷Éϼܣ¬È´Ã»ÓÐ×ÔÐÅ¿ÉÒÔͨ¹ý£¬µÚ¶þ´ÎÉêÇëÄܹ»Í¨¹ýÎҺܸßÐË¡£

    ÖÁÓÚÊéµÄ³É¼¨ÎÒ²»±§ÈκÎÏ£Íû£¬Ö»ÊÇÏ£Íû¿ÉÒÔ»ìÒ»¸öÉÏ·Ñ£¬µ«ÊÇÄܲ»ÄÜ´ïµ½ÁËÕâ¸öÄ¿±ê£¬ÎÒ×Ô¼ººÜ²»×ÔÐÅ¡£
ÉϼÜÁË£¬ÎÒ˵Á½¾ä£¡(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»Õ Ŀ¼ ÏÂÒ»Ò³