·µ»Ø

ÎäÉñ¿Õ¼ä

Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
µÚһǧÁù°ÙÈýʮһÕ ץ²¶öïÅô(1/2)
   ´æÊéÇ© Êé¼Ü¹ÜÀí ·µ»ØÄ¿Â¼
ÔĶÁ¡£)

    ps£ºµÚËĸüµ½£¬ºóÃæ»¹ÓиüУ¬Ï£Íû´ó¼ÒÖ§³Ö£¬µÈ²»¼°µÄÐֵܿÉÒÔÃ÷ÌìÔçÉÏÆðÀ´ÔÙ¿´£¡
µÚһǧÁù°ÙÈýʮһÕ ץ²¶öïÅô(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»Õ Ŀ¼ ÏÂÒ»Ò³