Êéдµ½ÕâÀÒѾ½áÊøÁË£¬¸Ðл¸÷λ¶ÁÕß´ó´óµÄ²»Àë²»Æú£¬ÎÒ×î¸Ð¶¯µÄÒ»¼þÊ£¬¾ÍÊÇÎҶϸüÁËÒ»¶Îʱ¼äºó£¬µÇ¼ÎÒµÄ×÷¼Òºǫ́£¬ÒÀÈ»Äܹ»¿´µ½Ò»Î»½Ð¾ÞÍ·µÄÅóÓÑÿÌì°ÑËûÆßÕÅÍÆ¼öƱ¸øµ½ÎÒ£¬ÎҺܸж¯£¬ÕýÊÇÕâЩÈ˵ÄĬĬ֧³Ö£¬ÎÒ²ÅÄÜ×ßµ½ÏÖÔÚ£¬Õâ±¾Êé³É¼¨²»ºÃ£¬²»ÄܰÑËùÓеÄÔÒò¶¼¹é½áÓÚÆäËûÔÒò£¬¿ÉÄÜ»¹ÊÇÎıʱȽÏÖÉÄÛ¡£
½ÓÏÂÀ´Ó¦¸Ã»¹ÊÇ»áд£¬ÒѾÔÚ´òÄ¥´ó¸ÙÁË£¬Ï£ÍûÔÚδÀ´ºÍ´ó¼Ò½ºþÔÙ¼û£¬ÓÈÃ÷ÔÂÔÙ´Îлл¸÷λ£¡
ºóÑÔ(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ