¾«Æ·Îĵµ

Ö±ÏßEFÓëSAËù³ÉµÄ½ÇΪ£¨ £© A 300 B 450 C 600 D 900 ¶þ¡¢Ñ¡ÔñÌâ

7¡¢ºÍÁ½ÌõƽÐÐÖ±ÏßÖеÄÒ»ÌõÊÇÒìÃæÖ±ÏßµÄÖ±ÏßÓëÁíÒ»ÌõÖ±ÏßµÄλÖùØϵÊÇ¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª

8¡¢Éèa¡¢b¡¢c±íʾֱÏߣ¬¸ø³öËĸöÂ۶ϣº¢Ùa?b¢Úc?c¢Ûa?c¢Üa//c£¬ÒÔÆäÖÐÈÎÒâÁ½¸öΪÌõ¼þ£¬ÁíÍâµÄijһ¸öΪ½áÂÛ£¬Ð´³öÄãÈÏΪÕýÈ·µÄÒ»¸öÃüÌ⡪¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª

9¡¢ABCDEFÊÇÕýÁù±ßÐΣ¬PÊÇËüËùÔÚƽÃæÍâÒ»µã£¬Á¬½ÓPA¡¢PB¡¢PC¡¢PD¡¢PE¡¢PFºóÓëÕýÁù±ßÐεÄÁùÌõ±ßËùÔÚÖ±Ïß¹²Ê®¶þÌõÖ±ÏßÖУ¬ÒìÃæÖ±Ïß¹²ÓСª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¶Ô¡£

10¡¢µãE¡¢F¡¢G¡¢H·Ö±ðÊÇ¿Õ¼äËıßÐÎABCDµÄ±ßAB¡¢BC¡¢CD¡¢DAµÄÖе㣬ÇÒBD£½AC£¬ÔòËıßÐÎEFGHÊÇ¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡£

Èý¡¢½â´ðÌ⣺

11¡¢ÔÚ³¤·½ÌåABCD-A1B1C1D1ÖУ¬µ×ÃæABCDΪ±ß³¤Îª2µÄÕý·½ÐΣ¬¸ßAA1Ϊ1£¬M¡¢N·Ö±ðΪ±ßC1D1ÓëA1D1µÄÖе㡣 £¨1£©ÇóÖ¤£ºËıßÐÎMNACÊǵÈÑüÌÝÐÎ £¨2£©ÇóÌÝÐÎMNACµÄÃæ»ý

¾«Æ·Îĵµ

¾«Æ·Îĵµ

12¡¢ÒÑÖªABCD-A1B1C1D1ÊÇÕý·½Ìå £¨1£©ÇóA1C1ÓëB1CËù³É½Ç £¨2£©ÇóA1CÓëAD1Ëù³É½Ç

£¨3£©ÈôEF·Ö±ðΪAB¡¢ADµÄÖе㣬ÇóA1C1ÓëEFÒÔ¼°AD1ÓëEFËù³É½ÇµÄ´óС¡£

¾«Æ·Îĵµ

¾«Æ·Îĵµ

¾«Æ·Îĵµ

¾«Æ·Îĵµ

2.3¿Õ¼äµã¡¢Ö±Ïß¡¢Æ½ÃæÖ®¼äµÄ¹Øϵ£¨3£©

Ò»¡¢Ñ¡ÔñÌâ

1¡¢ÒÑÖªÖ±Ïßa//?,b??£¬ÔòaÓëbµÄ¹ØϵÊÇ£¨ £© A Ïཻ B ƽÐÐ C ÒìÃæ D ƽÐлòÒìÃæ

¾«Æ·Îĵµ