Question

2£®ÈçͼËùʾÊDzâÁ¿Ð¡³µÑØбÃæÏ»¬µÄƽ¾ùËٶȵÄʵÑ飮
£¨1£©¸ÃʵÑéÄ¿µÄÊÇÁ·Ï°Óÿ̶ȳߺÍÃë±í²âƽ¾ùËٶȣ®
£¨2£©¸ÃʵÑéÔ­ÀíÊÇv=$\frac{s}{t}$£®
£¨3£©ÊµÑéʱ¹Û²ìµ½£¬Ð¡³µÑØбÃ涥¶ËÏ»¬µ½Ð±Ãæµ×¶ËµÄÔ˶¯ÊDZäËÙÖ±ÏßÔ˶¯£®£¨Ñ¡Ìî¡°ÔÈËÙ¡±»ò¡°±äËÙ¡±£©
£¨4£©ÊµÑéÖвâµÃ·³Ìs₁ÉϵÄƽ¾ùËÙ¶ÈΪv₁£¬Â·³Ìs₂ÉϵÄƽ¾ùËÙ¶ÈΪv₂£¬Â·³Ìs₃ÉϵÄƽ¾ùËÙ¶ÈΪv₃£®ÄÇô£¬v₁¡¢v₂¡¢v₃µÄ´óС¹ØϵÊÇC
A£®v₁£¾v₂£¾v₃        B£®v₁£¼v₂£¼v₃        C£®v₃£¾v₁£¾v₂         D£®v₃£¼v₁£¼v₂£®

Answer 1

·ÖÎö £¨1£©ÔÚÓÃбÃæС³µ²âÁ¿Æ½¾ùËٶȵÄʵÑéÖУ¬Òª²âÁ¿Ð¡³µÔ˶¯µÄ·³ÌºÍʱ¼ä£¬Óõ½¿Ì¶È³ßºÍÃë±í£¬²¢´úÈ빫ʽv=$\frac{s}{t}$½øÐмÆË㣻
£¨2£©Ð¡³µÔÚÏ»¬¹ý³ÌÖУ¬ËÙ¶ÈÖð½¥±ä´ó£¬ÓÉ´Ë¿ÉÒÔÅжϳö¸÷¶Îƽ¾ùËٶȵĴóС£®

½â´ð ½â£º£¨1£©ÊµÑéÖÐÒªÓòâÁ¿Ð¡³µÔ˶¯µÄ·³Ì£¬ÓòâÁ¿Ð¡³µÔ˶¯µÄʱ¼ä£»
£¨2£©ÊµÑéÖÐÒªÀûÓù«Ê½v=$\frac{s}{t}$¼ÆËãС³µÆ½¾ùËٶȣ»
£¨3£©Ð¡³µÑØбÃ涥¶ËÏ»¬µ½Ð±Ãæµ×¶ËµÄÔ˶¯Ê±£¬ËÙ¶ÈÔ½À´Ô½´ó£¬Òò´ËÊDZäËÙÖ±ÏßÔ˶¯£»
£¨4£©ÓÉÓÚС³µÔÚÏ»¬¹ý³ÌÖÐ×ö¼ÓËÙÔ˶¯£¬ËùÒÔÉÏ°ë¶ÎµÄƽ¾ùËÙ¶È×îС£¬Ï°ë¶ÎµÄƽ¾ùËÙ¶È×î´ó£¬È«³ÌµÄƽ¾ùËٶȾÓÖУ®¹ÊÑ¡C
¹Ê´ð°¸Îª£º£¨1£©¿Ì¶È³ß£»Í£±í£»£¨2£©v=$\frac{s}{t}$£»£¨3£©±äËÙ£»£¨4£©C£®

µãÆÀ ¡°²âС³µµÄƽ¾ùËٶȡ±µÄʵÑ飬¹Ø¼üÊÇÖªµÀʵÑéÔ­ÀíºÍ·½·¨£¬»á¸ù¾Ýƽ¾ùËٶȵĹ«Ê½v=$\frac{s}{t}$±È½Ïƽ¾ùËٶȵĴóС£®