ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ½ðÊô°ôMN£¬ÔÚÊúÖ±·ÅÖõÄÁ½¸ùƽÐе¼¹ìÉÏÎÞĦ²ÁµØÏ»¬£¨µ¼¹ì×ã¹»³¤£©£¬µ¼¹ì¼ä´®ÁªÒ»¸öµç×裬´Å¸ÐÇ¿¶È´¹Ö±ÓÚµ¼¹ìƽÃ棬°ôºÍµ¼¹ìµÄµç×è²»¼Æ£¬MN´Ó¾²Ö¹¿ªÊ¼ÏÂÂä¹ý³ÌÖУ¬µç×èRÉÏÏûºÄµÄ×î´ó¹¦ÂÊΪP£¬ÒªÊ¹RÏûºÄµÄµç¹¦ÂÊÔö´óµ½4P£¬¿É²ÉÈ¡µÄ·½·¨ÊÇ
A£®Ê¹MNµÄÖÊÁ¿Ôö´óµ½ÔÀ´µÄ2±¶
B£®Ê¹´Å¸ÐÇ¿¶ÈBÔö´óµ½ÔÀ´µÄ2±¶
C£®Ê¹´Å¸ÐÇ¿¶ÈB¼õСµ½ÔÀ´µÄÒ»°ë
D£®Ê¹µç×èRµÄ×èÖµ¼õµ½ÔÀ´µÄÒ»°ë
AC
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿