如题所述
å¦ä¸ï¼
1ãç®åçµè¡¨æ°ä¸º2831.25度ã
2ãä¸é¢ä¸æ¯æ æäºè¯»æ°åºé´ä¹ã
3ã10--ä¸é¢æ¯3å°±æ¯30度ã
æåçæ¯0.1计ç®ï¼å°±æ¯è½¬å°10å°±æ¯1度ã