ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿»Æ»¨Ýï(¶þ±¶Ì壬18ÌõȾɫÌå)µÄ¾¥¸ÑÑÕÉ«ÓÉÁ½¶Ô¶ÀÁ¢ÒÅ´«µÄµÈλ»ùÒòA¡¢aºÍB¡¢b¿ØÖÆ£¬»ùÒòA¿ØÖƺìÉ«Ëغϳɣ¨AAºÍAaµÄЧӦÏàͬ£©£¬»ùÒòBΪÐÞÊλùÒò£¬BBʹºìÉ«ËØÍêÈ«Ïûʧ£¬BbʹºìÉ«ËØÑÕÉ«µ»¯¡£ÏÖÓÃÁ½×é´¿ºÏÇ×±¾½øÐÐÔÓ½»£¬ÊµÑé½á¹ûÈçÏ£º
Çë»Ø´ðÒÔÏÂÎÊÌ⣺
(1)µÚÒ»¡¢¶þ×éF1Öз۸ѵĻùÒòÐÍ·Ö±ðÊÇ £¬ÈôµÚ¶þ×éF1·Û¸Ñ½øÐв⽻£¬ÔòF2 Öкì¸Ë£º·Û¸Ñ£º°×¸Ë£½ ¡£
(2)Èõڶþ×éF2Öз۸ѸöÌå×Ô½»£¬ºó´úÈÔΪ·Û¸ÑµÄ¸öÌå±ÈÀýÕ¼ ¡£
(3)ÈôBBºÍBbµÄÐÞÊÎ×÷ÓÃÏàͬ£¬ÇÒ¶¼»áʹºìÉ«ËØÍêÈ«Ïûʧ£¬µÚÒ»×éF1ȫΪ°×¸Ñ£¬F2Öкì¸Ñ£º°×¸Ñ=1£º3£¬µÚ¶þ×éÖÐÈô°×¸ÑÇ×±¾ÓëµÚÒ»×éÖв»Í¬£¬F1Ҳȫ²¿±íÏÖΪ°×¸Ñ£¬ÄÇôF1 ×Ô½»µÃF2µÄ±íÏÖÐͼ°±ÈÀýΪ____¡£
(4)Ëı¶Ìå»Æ»¨ÝïÖÐÇàÝïËغ¬Á¿Í¨³£¸ßÓÚÒ°ÉúÐͻƻ¨ÝµÍδ¦ÀíÒ°ÉúÐͻƻ¨ÝïÕýÔÚÓÐË¿·ÖÁѵÄϸ°û»áµ¼ÖÂȾɫÌå²»·ÖÀ룬´Ó¶ø»ñµÃËı¶Ìåϸ°û²¢·¢Óý³ÉÖ²Öê¡£ÍƲâµÍδ¦Àíµ¼ÖÂϸ°ûȾɫÌå²»·ÖÀëµÄÔÒòÊÇ ¡£Ëı¶Ìå»Æ»¨ÝïÓëÒ°ÉúÐͻƻ¨ÝïÔÓ½»ºó´úÌåϸ°ûµÄȾɫÌåÊýΪ ¡£
¡¾´ð°¸¡¿
£¨1£©AABb AaBb 1£º1£º2 £¨2£©5/12
£¨3£©ºì¸Ñ:°×¸Ñ=3:13
£¨4£©µÍÎÂÒÖÖÆ·Ä´¸ÌåÐÎ³É £¨1·Ö£© 27£¨1·Ö£©
¡¾½âÎö¡¿ÒÀÌâÒâ¿ÉÖª£º»Æ»¨ÝïµÄ¾¥¸ÑÑÕÉ«µÄÒÅ´«×ñÑ»ùÒòµÄ×ÔÓÉ×éºÏ¶¨ÂÉ£¬ºì¸ÑΪA_bb£¬·Ûºì¸ÑΪA_Bb£¬°×¸ÑΪA_BB¡¢aaB_ºÍaabb¡£
£¨1£©µÚÒ»×飺°×¸ÑºÍºì¸ÑÁ½¸öÇ×±¾ÔÓ½»F1ȫΪ·Û¸Ñ£¬ËµÃ÷Ë«Ç×¾ùΪ´¿ºÏ×Ó£¬ºì¸ÑÇ×±¾µÄ»ùÒòÐÍΪAAbb£¬°×¸ÑÇ×±¾µÄ»ùÒòÐÍÖÐÒ»¶¨º¬ÓлùÒòB£¬F1×Ô½»ËùµÃF2Öкì¸Ñ£º·Û¸Ñ:£º°×¸Ñ£½1:2:1,˵Ã÷F1µÄ»ùÒò×é³ÉÖÐÖ»ÓÐ1¶Ô»ùÒòÔӺϣ¬½ø¶øÍÆÖª°×¸ÑÇ×±¾µÄ»ùÒòÐÍΪAABB£¬F1µÄ»ùÒòÐÍΪAABb¡£µÚ¶þ×飺°×¸ÑºÍºì¸ÑÁ½¸öÇ×±¾ÔÓ½»F1ȫΪ·Û¸Ñ£¬ËµÃ÷Ë«Ç×¾ùΪ´¿ºÏ×Ó£¬F1×Ô½»ËùµÃF2Öкì¸Ñ£º·Û¸Ñ:£º°×¸Ñ£½3:6:7£¬Îª9:3:3:1µÄ±äʽ£¬ËµÃ÷F1µÄ»ùÒòÐÍΪAaBb£¬Ë«Ç׵ĻùÒòÐÍ·Ö±ðΪaaBBºÍAAbb¡£ÈôµÚ¶þ×éF1·Û¸Ñ½øÐв⽻£¬¼´AaBbÓëaabb½»Å䣬ÔòF2 Öкì¸Ë£¨Aabb£©£º·Û¸Ñ£¨AaBb£©£º°×¸Ë£¨aaBbÓëaabb£©£½1:1:2¡£
£¨2£©½áºÏ¶Ô£¨1£©µÄ·ÖÎö¿ÉÖª£ºµÚ¶þ×éF2Öз۸ѸöÌåµÄ»ùÒòÐÍΪ1/3AABb¡¢2/3AaBb£¬1/3AABbµÄ×Ô½»ºó´úÖеķ۸ѸöÌåËùÕ¼±ÈÀýΪ1/3¡Á1AA¡Á1/2Bb£½1/6AABb£¬2/3AaBbµÄ×Ô½»ºó´úÖеķ۸ѸöÌåËùÕ¼±ÈÀýΪ2/3¡Á3/4A_¡Á1/2Bb£½1/4A_Bb£¬Òò´Ëºó´úÈÔΪ·Û¸ÑµÄ¸öÌå±ÈÀýÕ¼1/6£«1/4£½5/12¡£
£¨3£©ÈôBBºÍBbµÄÐÞÊÎ×÷ÓÃÏàͬ£¬ÇÒ¶¼»áʹºìÉ«ËØÍêÈ«Ïûʧ£¬ÔòµÚ¶þ×éÖÐF1£¨AaBb£©×Ô½»µÃF2µÄ±íÏÖÐͼ°±ÈÀýΪºì¸Ñ£¨3A_bb£©£º°×¸Ñ£¨9A_B_£«3aaB_£«1aabb£©£½3:13¡£
£¨4£©µÍÎÂÄܹ»ÒÖÖÆ·Ä´¸ÌåµÄÐγɣ¬µ¼ÖÂȾɫÌå²»·ÖÀë¡£ÒÀÌâÒâ¿ÉÖª£ºÒ°ÉúÐͻƻ¨ÝïΪ¶þ±¶Ì壬ÆäÌåϸ°ûÖк¬ÓÐ18ÌõȾɫÌ壬²úÉúµÄÅä×ÓÖк¬ÓÐ9ÌõȾɫÌ壻Ëı¶Ìå»Æ»¨ÝïµÄÌåϸ°ûÖк¬ÓÐ36ÌõȾɫÌ壬²úÉúµÄÅä×ÓÖк¬ÓÐ18ÌõȾɫÌ壻×ÛÉÏ·ÖÎö£¬Ëı¶Ìå»Æ»¨ÝïÓëÒ°ÉúÐͻƻ¨ÝïÔÓ½»ºó´úÌåϸ°ûµÄȾɫÌåÊýΪ27Ìõ¡£