ÌâÄ¿ÄÚÈÝ
14£®£¨1£©A£¬BÁ½ÃûͬѧµÄ¼ÒÏà¾à2100m£®
£¨2£©Bͬѧ×ßÁËÒ»¶Î·ºó£¬×ÔÐгµ·¢Éú¹ÊÕÏ£¬½øÐÐÐÞÀí£¬ÐÞÀí×ÔÐгµËùÓõÄʱ¼äÊÇ10min£®
£¨3£©Bͬѧ³ö·¢ºó30minÓëAͬѧÏàÓö£®
£¨4£©Çó³öAͬѧÀëBͬѧ¼ÒµÄ·³ÌsAÓëʱ¼ätµÄº¯Êý¹ØÏµÊÆ£®
·ÖÎö £¨1£©´ÓͼÉϿɿ´³öA£¬BÁ½ÃûͬѧµÄ¼ÒÏà¾à2100Ã×£®
£¨2£©ÐÞÀíµÄʱ¼ä¾ÍÊÇ·³Ì²»±äµÄʱ¼äÊÇ15-5=10min£®
£¨3£©´ÓͼÏó¿´³ö30minʱ£¬Á½¸öͼÏóÏཻ£¬ËùÒÔ30minʱÏàÓö£®
£¨4£©SAºÍtµÄº¯Êý¹ØÏµÊÇÒ»´Îº¯Êý£¬É躯ÊýÊÇΪS=kx+t£¬¹ý£¨0£¬2100£©ºÍ£¨33£¬4500£©£¬´Ó¶ø¿ÉÇó³ö¹ØÏµÊ½£®
½â´ð ½â£º¸ù¾ÝͼÏóÖª£º£¨1£©A£¬BÁ½ÃûͬѧµÄ¼ÒÏà¾à2100Ã×£»
¹Ê´ð°¸Îª£º2100£»
£¨2£©ÐÞÀí×ÔÐгµµÄʱ¼äΪ£º15-5=10min£»
¹Ê´ð°¸Îª£º10£»
£¨3£©Bͬѧ³ö·¢ºó30minʱAͬѧÏàÓö£®£»
¹Ê´ð°¸Îª£º30£»
£¨4£©É躯ÊýÊÇΪSA=kx+t£¬ÇÒ¹ý£¨0£¬2100£©ºÍ£¨30£¬4500£©£¬
¡à$\left\{\begin{array}{l}{t=2100}\\{4500=30k+t}\end{array}\right.$£¬
½âµÃ£º$\left\{\begin{array}{l}{k=80}\\{t=2100}\end{array}\right.$£¬
¡àAͬѧÀëBͬѧ¼ÒµÄ·³ÌsAÓëʱ¼ätµÄº¯Êý¹ØÏµÊ½£ºy=80x+2100£®
µãÆÀ ±¾Ì⿼²éÒ»´Îº¯ÊýµÄÓ¦Ó㬹ؼü´ÓͼÏóÉÏ»ñÈ¡ÐÅÏ¢£¬¸ù¾ÝͼÏóµÄÈ·¶¨º¯ÊýÐÎʽ£¬Éè³öº¯Êýʽ£¬´úÈëÒÑÖªµãÈ·¶¨º¯Êýʽ£¬Çó±äÁ¿»òº¯ÊýÖµ»ò½»µã£®
| A£® | 8£¬15£¬17 | B£® | 5£¬12£¬13 | C£® | 2£¬3£¬4 | D£® | 7£¬24£¬25 |
| A£® | 2¸ö | B£® | 3¸ö | C£® | 4¸ö | D£® | 5¸ö |
| A£® | 130¡ã | B£® | 50¡ã | C£® | 40¡ã | D£® | 60¡ã |
| A£® | 4cm2 | B£® | 2cm2 | C£® | 1cm2 | D£® | 6cm2 |