·µ»Ø
У²Ý¶À³è£¡Ê×ϯ÷ÈÉÙÌ«Ç¿ÊÆ
Ê×Ò³
¹ØµÆ
»¤ÑÛ
×ÖÌ壺
´ó
ÖÐ
С
·ÆªµÄÒâ˼ÊÇ×¼±¸Ï´αí°×»¹ÊÇ·ÅÆú(1/2)
´æÊéÇ©
Êé¼Ü¹ÜÀí
·µ»ØÄ¿Â¼