ÌâÄ¿ÄÚÈÝ
£¨¹²20·Ö£©
£¨1£©£¨4·Ö£©Îª½â¾öÂ¥µÀµÄÕÕÃ÷£¬ÔÚÂ¥µÀÄÚ°²×°Ò»¸ö´«¸ÐÆ÷ÓëµçµÆ¿ØÖƵç·Ïà½Ó£¬µ±Â¥µÀÄÚÓÐÈË×߶¯¶ø·¢³öÉùÏìʱ£¬µçµÆ¼´±»½ÓͨµçÔ´¶ø·¢¹â£¬ÕâÖÖ´«¸ÐÆ÷ÊäÈëµÄÊÇ Ðźţ¬¾¹ý´«¸ÐÆ÷ת»»ºó£¬Êä³öµÄÊÇ Ðźš£
£¨2£©£¨16·Ö£©Ä³Í¬Ñ§Éè¼ÆÁËÒ»¸ö²â¶¨»¬¿éÓëľ°åÎʶ¯Ä¦²ÁÒòÊýµÄʵÑé¡£×°ÖÃÈçͼ1Ëùʾ£¬ ÆäÖÐMΪ»¬¿é£¬mºÍm¡äÊÇÖÊÁ¿¿Éµ÷µÄƬÂ룬ϸÉþºÍ»¬ÂÖµÄÖÊÁ¿¶¼¿ÉÒÔºöÂÔ²»¼Æ¡£ÊµÑé¹ý³ÌÖУ¬¸ÃͬѧÔÚƬÂë×ÜÖÊÁ¿m+ m¡ä=m0±£³Ö²»±äµÄÌõ¼þÏ£¬¸Ä±ämºÍm¡äµÄ´óС£¬²â³ö²»Í¬£¬mÏÂϵͳµÄ¼ÓËٶȣ¬È»ºóͨ¹ýʵÑéÊý¾ÝµÄ·ÖÎö¾Í¿ÉÒÔÇó³ö»¬¿éºÍľ°å¼äµÄ¶¯Ä¦²ÁÒòÊý¡£
¢ÙÔÚʵÑéÆ÷²Ä·½Ã棬¸ÃͬѧѡÔñÁË´òµã¼ÆʱÆ÷¡¢Ã¿Æ¬ÖÊÁ¿Îª150gµÄƬÂë×ܹ²10Ƭ¡¢»¬ ¿é¡¢Ä¾°å¡¢»¬ÂÖ¸÷Ò»¸ö¡¢Ï¸ÏßÈô¸É¡££¬³ý´ËÒÔÍâ¸ù¾Ý±¾ÊµÑéËùÒª²âÁ¿µÄÎïÀíÁ¿£¬ÄãÈÏΪ³ýÁ˸ÃͬѧÒÑÑ¡ÔñµÄÒÇÆ÷ÒÔÍ⣬ÔÚÏÂÁб¸Ñ¡ÒÇÆ÷Öл¹ÐèÒª£º (Ìîд×Öĸ´úºÅ¼´¿É)¡£
A£ºÃë±í B£ººÁÃ×¿Ì¶È³ß C£ºÑ§ÉúÓÃÖ±Á÷µçÔ´ D£ºÑ§ÉúÓý»Á÷µçÔ´
¢ÚÒÔÏÂÊÇΪÁ˲âÁ¿»¬¿éµÄ¼ÓËٶȣ¬ÓÉʵÑéµÃÀ´µÄÒ»ÌõÖ½´ø¡£´Ó±È½ÏÇåÎúµÄOµã¿ªÊ¼£¬¸ÃͬѧÿÊý5¸öµã×öΪһ¸öÖÊýµã£¬ËüÃÇ·Ö±ðΪ£ºA¡¢B¡¢C¡¢D¡¢E¡¢FµÈ£¬²âÁ¿³ö¸÷ÏàÁÚ ¼ÆÊýµãÖ®¼äµÄ¾àÀ룬Èçͼ2Ëùʾ¡£¸ù¾ÝÕâÌõÖ½´ø£¬Çó³öÕâ´ÎʵÑéʱ»¬¿éµÄ¼ÓËÙ¶ÈΪ£º
m£¯s2(½á¹û±£Áôµ½Ð¡ÊýµãºóÁ½Î»)¡£
¢ÛÔÚʵÑéµÄÊý¾Ý´¦Àí¹ý³ÌÖУ¬¸ÃͬѧÒÔƬÂëmµÄÖÊÁ¿ÎªºáÖᣬÒÔϵͳµÄ¼ÓËÙ¶ÈaΪ×ÝÖᣬ»æÖÆÁËÈçÏÂͼ3ËùʾµÄʵÑéͼÏß¡£
ÀíÂÛºÍʵÑé¾ùÒÑÖ¤Ã÷£¬ÔÚ»¬¶¯µÄÌõ¼þÏ£¬aºÍmÊÇÒ»´Îº¯Êý¹Øϵ£¬¼´¿ÉÒÔд³É£º
¡£a=km+c£¨Ê½ÖеÄkºÍcΪ³£Êý£©µÄÐÎʽ¡£ÄÇô£¬±¾ÊµÑéÖеij£Êý¾ßÌå±í´ïʽÒòÊý¶Ç£ºk= £¬c= £»½áºÏ±¾ÊµÑéͼÏߵóöµÄ»¬¿éÓëľ°åÎʵĶ¯Ä¦²ÁÒòÊý¦Ì= ¡£
£¨1£©ÉùÒô£¬µç
£¨2£©¢ÙB D£»¢Ú0.81£»¢Û£¬£¬0.3
½âÎö