µÚÁ½Ç§Á½°ÙÎåÊ®ÎåÕ Ȱ˵²»³É(1/2)
Ò»¸öÄê¹ýµÄû×Ìû棬ÓÈÆäÊÇÔÚ¿´µ½Í⹫ÍâÆÅºÍÒ¯Ò¯ÄÌÄ̵ÄʱºòÕâÖָоõÓÈÉõ¡£ÐþÀÏÒ¯×ÓÓÐÕæ¹¦·ò°øÉí£¬¼ÓÉÏÍíÄêÐÝÑøµÃµ±Ñî¶«Ðñ·¢¼ÒÖ®ºó¸÷ÖÖÕä¹óÒ©²ÄûÉÙÍùÐþÀÏÒ¯×ÓÕâ±ßËÍ£¬ËùÒÔ»îÁËÒ»°Ù¶àËê¡£¡·È«ÎÄ×Ö¸üÐÂ,ÀμÇÍøÖ·:,
µÚÁ½Ç§Á½°ÙÎåÊ®ÎåÕ Ȱ˵²»³É(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ