1
æ£æ¹å½¢å½©çº¸å¯¹æã
请ç¹å»è¾å
¥å¾çæè¿°
2
两边å¾ä¸é´æã
请ç¹å»è¾å
¥å¾çæè¿°
3
两边åä¸ç¿»æï¼æåºä¸¤ä¸ªä¸è§å½¢ã
请ç¹å»è¾å
¥å¾çæè¿°
4
ä¸é¢çé¨ååä¸ç¿»æã
请ç¹å»è¾å
¥å¾çæè¿°
5
ç«èµ·æ¥ï¼ä¸é´é¨ååä¸æã
请ç¹å»è¾å
¥å¾çæè¿°
6
æå·¥å°é¢ç´å°±å好äºã