·µ»Ø
´óÃ÷µÕ³¤×Ó
Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
ÌáǰÇë¼Ù(1/2)
´æÊéÇ©
Êé¼Ü¹ÜÀí
·µ»ØÄ¿Â¼
ÌáǰÇë¼Ù
¹ýÄêÆÚ¼ä£¬ÉÙ²»µÃ×ßÇ×ÆÝ¡¢ºÈ¾Æ¡£
Õ⼸Ìì¶¼¾¡Á¿³éʱ¼äÂë×ÖÁË¡£
ÌáǰÇë¼Ù(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ
ÉÏÒ»ÕÂ
Ŀ¼
ÏÂÒ»Ò³