һתÑÛ£¬·¢ÊéÒ²Ò»¸ö¶àÔÂÁË£¡
ÔÚ¸÷λ¶ÁÕß´ó´óµÄ×·¶Á֮ϣ¬Õâ±¾ÊéÒ²ÊÇÉÏÁËÁ½ÂÖÍÆ¼ö£¬Ï´Ò»úÏÈлл¸÷λÁË£¡
µ«ÊÇÓÉÓÚÔÛ±¾ÊÂÓÐÏÞ£¬»¹ÊÇûÄÜÎüÒýµ½¸ü¶àµÄ¶ÁÕߣ¬Òò´ËºóÐø³É¼¨Ò»°ã¡£
²»¹ý²»¹ÜÔõôÑù£¬ÎÒ¶¼»áºÃºÃµÄд£¬Õý³££¬ÉõÖÁ¶à¸üÐÂһЩ£¡
ÉϼܸÐÑÔ(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ