ÓÖ±»²»ÉÙÊéÓѽÌÓýÁË£¬¿´¹ýÉϱ¾ÊéµÄÀÏÅóÓѶ¼ÖªµÀ£¬ÎÒÏòÀ´ÊǺÜÉٸĴó¸ÙµÄ£¬µ«±»ÅçµÄʵÔÚÌ«ÄÑÊÜ£¬¡¶×·Ãγà×ÓÐÄ¡·¡¢¹ú×ã¡¢ÕÅÒãÕâЩ¶«Î÷ÒòΪÊÇÓÐÁª¶¯µÄ£¬Éæ¼°µ½ºóÃæµÄһЩ¾çÇ飬¸ÄµÄ»°µÈÓÚÊÇÒª´ÓÍ·¿ªÊ¼µÄ´ó¸Ä£¬ÕâÀï¾ÍÏÈ°ÑÆßϦÓøèÇú¡¶ËÀÁ˶¼Òª°®¡·ºÍ¡¶Ç×Ãܰ®ÈË¡·¸Ä³É¡¶¾ªºèÒ»Ãæ¡·ºÍ¡¶Á¹Á¹¡·ÕâÁ½Ê×Óйŷç¹ú·çÔªËØµÄ¸è£¬¸Ä¶¯²»Ó°ÏìÔĶÁ¡£
˵¸öÊÂ(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ