£¨¿ÉÊäÈë¶à¸ö¼ìË÷´Ê£¬¼ìË÷´ÊÖ®¼äÓÃand¡¢or¡¢not·Ö±ð±íʾÓë¡¢»ò¡¢·Ç¡££©
¹²¼ìË÷µ½0ƪÎÄÏ×£¬·Ö0Ò³£¬µ±Ç°ÎªµÚ1Ò³
Ðò ºÅ ±ê Ìâ À¸ Ä¿ ʱ ¼ä
δ¼ìË÷µ½·ûºÏÌõ¼þµÄÎÄÏ×£¡

µÚÒ»Ò³ ÉÏÒ»Ò³ ÏÂÒ»Ò³ ×îºóÒ»Ò³ ×ܹ² 0 Ò³ µ±Ç° 1/0
Ìøµ½   Ò³