·µ»Ø

÷è÷ë׸Ðö

Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
µÚһǧһ°Ù°ËÊ®ÁùÕÂÄϾ³ÓÐÊÂ(1/2)
   ´æÊéÇ© Êé¼Ü¹ÜÀí ·µ»ØÄ¿Â¼
Ò¶÷ëÁ¢¿ÌÖåü£¬ÒòΪËûÇå³þ£¬²»ÊÇÖØÒªµÄÊ£¬²»»á»ã±¨µ½ËûÕâÀïµÄ¡£
µÚһǧһ°Ù°ËÊ®ÁùÕÂÄϾ³ÓÐÊÂ(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»Õ Ŀ¼ ÏÂÒ»Ò³