亮亮 ææ ææä¸äººå»ä¹¦åºä¹°ä¹¦ï¼ä»ä»¬å
±æ54å
ã亮亮ç¨äºèªå·±é±æ°çäºåä¹ä¸ï¼ææç¨äºèªå·±é±æ°çç¾åä¹ä¸åäºï¼ææç¨äºèªå·±é±æ°çä¸åä¹äºï¼åä¹°äºä¸æ¬è¶£å³æ°å¦ãé£ä¹äº®äº®åææ两人å©ä¸çé±æ°å
±æå¤å°å
ï¼
çæ¡ï¼äº®äº®åææå©ä¸çé±æ¯12å
2ãå°å
°èµ°çè·¯ç¨æ¯å°èå¤ååä¹ä¸ï¼èå°èæç¨çæ¶é´æ¯å°å
°å¤ååä¹ä¸ï¼åå°å
°åå°èçé度æ¯æ¯å¤å°ï¼
çæ¡ï¼é度æ¯
(5s/4)/t:s/(11t/10)
=11:8
3ãæä¸ä¸ªé¿æ¹ä½å°ç®±,ä»éé¢éé¿40åç±³,宽30åç±³,æ·±35åç±³,ç®±ä¸æ°´é¢é«10åç±³,æ¾è¿ä¸ä¸ªæ£±é¿20åç±³çæ£æ¹ä½éåå,éå顶é¢ä»é«äºæ°´é¢.è¿æ¶æ°´é¢é«å¤å°åç±³?
çæ¡ï¼15cm
温馨提示:答案为网友推荐,仅供参考