ÌâÄ¿ÄÚÈÝ
ÔÚ͸Ã÷¾ùÔȽéÖÊÄÚÓÐÒ»Çò×´¿ÕÆøÅÝ, Ò»Êø°üº¬a¡¢bÁ½ÖÖµ¥É«¹âµÄϸ¹âÊø´Ó½éÖÊÉäÈëÆøÅÝ, AΪÈëÉäµã, Ö®ºóa¡¢bÉ«¹â·Ö±ð´ÓCµã¡¢DµãÉäÏò½éÖÊ£¬ÈçͼËùʾ¡£ÒÑÖªAµãµÄÈëÉä½ÇΪ30¡ã£¬aÉ«¹âµÄÆ«Ïò½ÇΪ45¡ã(Cµã³öÉä¹âÏßÓëÈëÉä¹âÏߵļнÇ), CD»¡Ëù¶ÔµÄÔ²ÐĽÇΪ3¡ã, ÔòÏÂÁнáÂÛÕýÈ·µÄÊÇ ( )![]()
| A£®bÉ«¹âµÄÆ«Ïò½ÇΪ43.5¡ã |
| B£®½éÖʶÔaÉ«¹âµÄÕÛÉäÂÊna= |
| C£®bÉ«¹â´Ó½éÖÊÉäÏò¿ÕÆøµÄÁÙ½ç½ÇÕýÏÒ |
| D£®ÈôÓÃa¡¢bÁ½µ¥É«¹â·Ö±ðͨ¹ýͬһ˫·ì¸ÉÉæ×°Öã¬ÆÁÉϵÄÌõÎÆ¼ä¾àDxa < Dxb |
CD
½âÎö
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿