1ãé£ä¸ªå æåªæ¯é»ç³ç级ä¸çä¸ä¸ªï¼è¿æé¢è²ï¼å度ååå·¥ã
2ãé»ç³åªçåè´¨ï¼ä¸çåççï¼åæ们ç1å æé»ç³ï¼é½æ¯GIAé»ç³ãGIAæ¯å ¨çä¸å¤§é»ç³è¯ä¹¦ä¹ä¸ã
å¦ä¸å°±æ¯ä¸ä¸ª1å æé»ç³ï¼ä½ å¯ä»¥ççã