·µ»Ø

Õâô²Ë´òʲôְҵ£¿»Ø¼ÒÑøÖíÈ¥°É

Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
ÆðµÄÓеãÍí£¬½ñÌìÁùµã¿ÉÄÜд²»Í꣬²»¹ýÒÀ¾É(1/2)
   ´æÊéÇ© Êé¼Ü¹ÜÀí ·µ»ØÄ¿Â¼
    ÆðµÄÓеãÍí£¬½ñÌìÁùµã¿ÉÄÜд²»Í꣬²»¹ýÒÀ¾ÉÒ»Íò¶þ

    ÈçÌ⣬ÄÖÖÓûÄÖÐÑ
ÆðµÄÓеãÍí£¬½ñÌìÁùµã¿ÉÄÜд²»Í꣬²»¹ýÒÀ¾É(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»Õ Ŀ¼ ÏÂÒ»Ò³