???¥è? ï¼?è®°è??äº??µæ?ï¼?è¿???ï¼?????稳ç?æµ?ä¸??½å??¿ç????¥ç»­?¿ç??½å?°è???ï¼??¿ç??§å????§é????å·¥å?·å·²ç­¾çº¦???¾ç??项ç???以ä?ç®?称â???ºé??项ç????ï¼????©å¤§?¶é??ä¸?ä¸??¿æ??è´·æ???设å??´æ?°æ?¹é??ä¸?项å??è´·æ?è´¢æ?¿è´´??·²ç­¾çº¦???¾ç??项ç???以ä?ç®?称â??è´·æ?项ç????ï¼???ç»??工建设ï????¹è?å¤?????è¿?»£??级ï?åº??§è?å¤???å¿???å½¹æ?æ±°ã???¥å??ï¼??½å????¹å???å¸????³ä???好æ?¨è???????èµ???è¦?项ç??¸­åº??§è?å¤?è§??????¶å?©ç?¨å·¥ä½??????¥ã??ï¼??¨ç½²??å¿???建å?å¼??©å¾ª???©ç?¨ä?ç³»ï??¨å?¨å??§è?å¤?èµ?æº??©å°½?¶ç?????好å?ºé????è´·æ?项ç??¸­åº??§è?å¤????¶å?©ç?¨å·¥ä½???

???¥è?æ±?ï¼????°è?对ç?§é¡¹?????ï¼??¨é?¢æ?¸æ????å½¹æ?æ±°å??§è?å¤????ºé????è´·æ?项ç?????µï?建ç??¸å?³å?ºé????è´·æ?项ç??¸­åº??§è?å¤?è§??????¶å?©ç?¨å·¥ä½??°è´¦ï¼???导ç?¸å?³é¡¹????ä½??¨æ?¨è?项ç????½æ?¶ç?ç­¹è????åº??§è?å¤????¶å?©ç?¨å·¥ä½?ï¼????¶è?è¸??åºþA??????¸å?³é¡¹????å½¹æ?æ±°ç??åº??§è?å¤???ç§?ç±»ã???°é?????»å??ç­??ºç?ä¿¡æ????

???¥è?æ±?ï¼?????解å?³ç?¸å?³é¡¹????§è?å¤????¶å?©ç?¨å·¥ä½?ä¸???ä¿¡æ???对称??对æ?¥ä?????ç­????ï¼???å®???ç»?èµ?æº?å¾????©ç?¨ä?ä¸?ä¸??¸å?³é¡¹???主å??ä½???ä¾???对æ?¥å·¥ä½???é¼??±è?æº?å¾????©ç?¨é???¹ä?ä¸???å±?åº??§äº§??设å????¶ã??è¿?è¾?????解ã???©ç?¨ä?ä½???ä¸??¡æ¨¡å¼?ï¼???å°?ä¸??´ç????ï¼???ä½?交æ????????