·µ»Ø

¶·ÂÞÖ®ºù«

Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
Çë¼Ù(1/2)
   ´æÊéÇ© Êé¼Ü¹ÜÀí ·µ»ØÄ¿Â¼
Ã÷ÌìҪȥÊÐÀï²Î¼Óµ¥Î»¿¼ÊÔ£¬ËùÒÔµÃÔç˯£¬½ñÌì¸üзÅÔÚÃ÷Ìì°É
Çë¼Ù(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»Õ Ŀ¼ ÏÂÒ»Ò³