Ä¿ÒªÇóµÄ¡£
£¨1£©ÒÑ֪ȫ¼¯U={СÓÚ10µÄÕýÕûÊý}£¬¼¯ºÏM={3£¬4£¬5}£¬P={1£¬3£¬6£¬9}£¬
Ôò¼¯ºÏ{2£¬7£¬8}= £¨ £©
£¨A£© £¨B£© £¨C£© £¨D£©
£¨2£© £¬Ôò ( )
£¨A£© £¨B£© £¨C£© £¨D£©
£¨3