ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ä³µ÷²éС×é¶Ôijһ¼Ò×åµÄµ¥»ùÒòÒÅ´«²¡£¨ÓÃA¡¢a±íʾ£©Ëù×÷µÄµ÷²é½á¹ûÈçͼËùʾ¡£ÏÂÁÐ˵·¨´íÎóµÄÊÇ
A£®¸ÃÒÅ´«²¡²»¿ÉÄܵÄÒÅ´«·½Ê½ÓаéYȾɫÌåÒÅ´«¡¢XȾɫÌåÒþÐÔÒÅ´«
B£®Èô´Ë²¡Îª°×»¯²¡£¬Ò»°×»¯²¡Å®×ÓÓëÕý³£ÄÐ×Ó½á»éºó£¬ÉúÁËÒ»¸ö»¼°×»¯²¡µÄº¢×Ó£¬ÈôËûÃÇÔÙÉúÁ½¸öº¢×Ó£¨·ÇË«°ûÌ¥£©£¬ÔòÁ½¸öº¢×ÓÖгöÏÖ°×»¯²¡µÄ¸ÅÂÊΪ3/4
C£®°´×î¿ÉÄܵÄÒÅ´«·½Ê½¿¼ÂÇ£¬Ôò¢ò£4ºÍ¢ó£5µÄ»ùÒòÐͶ¼ÎªXAXa
D£®Èô¢ô£3±íÏÖÕý³££¬¸ÃÒÅ´«²¡×î¿ÉÄÜÊdz£È¾É«ÌåÏÔÐÔÒÅ´«²¡£¬Ôò¢ô£5µÄÅ®¶ùµÄ»ùÒòÐÍΪAA¡¢Aa
¡¾´ð°¸¡¿D
¡¾½âÎö¡¿A¡¢·ÖÎöϵÆ×ͼ¿ÉÖª£¬¸Ã²¡ÓÐÅ®»¼Õߣ¬Ôò¸ÃÒÅ´«²¡²»¿ÉÄÜÊÇ°éYȾɫÌåÒÅ´«£¬ÓÖ´ÓͼÖп´³ö¢ó-5ÊÇ»¼²¡µÄÅ®º¢£¬µ«ËýµÄ¸¸Ç×¢ò-5Õý³££¬ËùÒÔÒ²²»¿ÉÄÜÊÇXȾɫÌåÒþÐÔÒÅ´«£¬AÕýÈ·£»B¡¢°×»¯²¡Êdz£È¾É«ÌåÒþÐÔÒÅ´«²¡£¬°×»¯²¡Å®×Ó»ùÒòÐÍaa£¬Ò»°×»¯²¡Å®×ÓÓëÕý³£ÄÐ×Ó½á»éºó£¬ÉúÁËÒ»¸ö»¼°×»¯²¡µÄº¢×Ó£¬¸ÃÄÐ×Ó»ùÒòÐÍΪAa£¬ÈôËûÃÇÔÙÉúÁ½¸öº¢×Ó£¨·ÇË«°ûÌ¥£©£¬ÔòÁ½¸öº¢×Ó£¬¶¼³öÏÖ°×»¯²¡µÄ¸ÅÂÊΪ1/2¡Á1/2=1/4,ÆäÖÐÒ»¸ö»¼°×»¯²¡µÄ¸ÅÂÊ£¨ÓÐÁ½ÖÖÇé¿ö£ºµÚÒ»¸ö°×»¯²¡£¬µÚ¶þ¸öÕý³££»µÚÒ»¸öÕý³££¬µÚ¶þ¸ö°×»¯²¡£©Îª1/2¡Á1/2¡Á2=1/2£¬ÔòÁ½¸öº¢×ÓÖгöÏÖ°×»¯²¡µÄ¸ÅÂÊΪ1/4+1/2=3/4£¬BÕýÈ·£»C¡¢¸Ã²¡»¼ÕßÖÐÅ®¶àÓÚÄУ¬ÇÒ»¼²¡¸¸Ç×µÄÅ®¶ù¶¼ÊÇ»¼Õߣ¬¹Ê¸Ã²¡×î¿ÉÄÜÊÇ°éXȾɫÌåÏÔÐÔÒÅ´«²¡£¬¢ò-4ÊÇ»¼Õߣ¬ÉúÓÐÕý³£¶ù×Ó£¬¹Ê»ùÒòÐÍΪXAXa£»¢ó-5ÊÇ»¼Õߣ¬Æ丸Ç×Õý³££¬¹Ê»ùÒòÐÍΪXAXa£¬CÕýÈ·£»D¡¢Èô¢ô-3±íÏÖÕý³££¬¸ÃÒÅ´«²¡´ú´úÏà´«£¬»¼Õ߽϶࣬×î¿ÉÄÜÊdz£È¾É«ÌåÏÔÐÔÒÅ´«²¡£¬¢ó-5µÄ»ùÒòÐÍΪAa£¬¢ó-6µÄ»ùÒòÐÍΪaa£¬¢ô-5µÄ»ùÒòÐÍΪAa»òaa£¬D´íÎó¡£
¡¾ÌâÄ¿¡¿ÒÑÖªÓñÃ×ijÁ½¶Ô»ùÒò°´ÕÕ×ÔÓÉ×éºÏ¹æÂÉÒÅ´«£¬ÏÖÓÐ×Ó´ú»ùÒòÐͼ°±ÈÖµÈçÏÂ
»ùÒòÐÍ | DDSS | DDSs | DDss | DdSS | DdSs | Ddss |
±ÈÀý | 1 | 2 | 1 | 1 | 2 | 1 |
ÔòË«Ç׵ĻùÒòÐÍÊÇ
A. DDSS¡ÁDDSs B. DdSs¡ÁDdSs C. DdSs¡ÁDDSs D. DdSS¡ÁDDSs