Ò»ÖÊÁ¿Îªm¡¢´øÕýµçµÄÁ£×ÓµçÁ¿q£¨²»¼ÆÖØÁ¦£©´ÓOµã´¦ÑØ+Y·½ÏòÒÔ³õËÙ¦Ô0ÉäÈëÒ»¸ö±ß½çΪ¾ØÐεÄÔÈÇ¿´Å³¡ÖУ¬´Å³¡·½Ïò´¹Ö±ÓÚxyƽÃæÏòÀËüµÄ±ß½ç·Ö±ðΪy=0¡¢y£½a¡¢x=-1.5a,x=1.5aÈçͼËùʾ,¸Ä±ä´Å¸ÐÇ¿¶ÈBµÄ´óС£¬Á£×ӿɴӴų¡µÄ²»Í¬±ß½çÃæÉä³ö¡¢²¢ÇÒÉä³ö´Å³¡ºóÆ«ÀëÔ­À´Ëٶȷ½ÏòµÄ½Ç¶È¦È»áËæÖ®¸Ä±ä¡£ÊÔÌÖÂÛÁ£×Ó¿ÉÒÔ´ÓÄļ¸¸ö±ß½çÃæÉä³ö£¬´ÓÕ⼸¸ö±ß½çÃæÉä³öʱ´Å¸ÐÇ¿¶ÈBµÄ´óС¼°Æ«×ª½Ç¶È¦È¸÷ÔÚʲô·¶Î§ÄÚ£¿

                                                                                                                                            

½â£ºÁ£×Ó×öÔ²ÖÜÔ˶¯µÄ°ë¾¶,                              £¨3£©

µ±R>aʱ£¬Á£×Ó½«´ÓÉϱ߽çÉä³ö£¬´ËʱB£¼,                     £¨4·Ö£©

£¬µ±a>R>3a/4ʱÁ£×Ó½«´Ó×ó±ß½çÉä³ö£¬´Ëʱ£»£¨4·Ö£©

µ±Ê±£¬Á£×Ó½«´Óϱ߽çÉä³ö£¬´Ëʱ,¦È=¦Ð£¨4·Ö£©

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2007?»´°²Ä£Ä⣩°ë¾¶ÎªrµÄ¾øÔµ¹â»¬Ô²»·¹Ì¶¨ÔÚÊúֱƽÃæÄÚ£¬»·ÉÏÌ×ÓÐÒ»ÖÊÁ¿Îªm¡¢´øÕýµçµÄÖé×Ó£¬¿Õ¼ä´æÔÚˮƽÏòÓÒµÄÔÈÇ¿µç³¡£¬ÈçͼËùʾ£®Öé×ÓËùÊܾ²µçÁ¦ÊÇÆäÖØÁ¦µÄ3/4±¶£®½«Öé×Ó´Ó»·ÉÏ×îµÍλÖÃAµã¾²Ö¹ÊÍ·Å£¬Çó£º
£¨1£©Öé×ÓËùÄÜ»ñµÃµÄ×î´ó¶¯ÄܺÍÔÚ×î´ó¶¯ÄÜ´¦»·¶ÔÖé×ÓµÄ×÷ÓÃÁ¦£»
£¨2£©ÒªÊ¹Öé×ÓÇ¡ºÃÄÜÈÆÔ²»·×öÍêÕûµÄÔ²ÖÜÔ˶¯£¬ÔòÓ¦ÔÚAµã¸øÖé×ÓÒÔ¶à´óµÄ³õËٶȣ¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚˮƽÏòÓÒµÄÔÈÇ¿µç³¡ÖУ¬ÓÐÒ»ÖÊÁ¿Îªm¡¢´øÕýµçµÄСÇò£¬Óó¤ÎªlµÄ¾øԵϸÏßÐü¹ÒÓÚOµã£¬µ±Ð¡Çò¾²Ö¹Ê±Ï¸ÏßÓëÊúÖ±·½Ïò¼Ð½ÇΪ¦È£¨ÈçͼËùʾ£©£®ÏÖ¸øСÇòÒ»¸ö´¹Ö±ÓÚÐüÏߵijõËٶȣ¬Ê¹Ð¡ÇòÔÚÊúֱƽÃæÄÚ×öÔ²ÖÜÔ˶¯£®ÊÔÎÊ£¨²»¼Æ¿ÕÆø×èÁ¦£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£©£º
£¨1£©ÈôСÇòÇ¡ºÃÍê³ÉÔ²ÖÜÔ˶¯£¬ÔòСÇòÔ˶¯¹ý³ÌÖеÄ×îСËÙ¶ÈÖµÊǶàÉÙ£¿
£¨2£©Ð¡ÇòµÄ³õËÙ¶ÈÖÁÉÙÊǶà´ó£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2008?ÃàÑôÄ£Ä⣩һÖÊÁ¿Îªm¡¢´øÕýµçµÄÁ£×Ó´Ó0 µãÊúÖ±ÏòÉϽøÈËÐéÏß¿òÄÚµÄˮƽ·½ÏòµÄÔÈÇ¿µç³¡ÖУ¬ÆäÔ˶¯¹ì¼£ÈçͼËùʾ£¬PµãΪ¹ì¼£µÄ×î¸ßµã£¬Ôò£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼËùʾ£¬BCDGÊǹ⻬¾øÔµµÄ
3
4
Ô²ÐιìµÀ£¬Î»ÓÚÊúֱƽÃæÄÚ£¬¹ìµÀ°ë¾¶ÎªR£¬Ï¶ËÓëˮƽ¾øÔµ¹ìµÀÔÚBµãƽ»¬Á¬½Ó£¬Õû¸ö¹ìµÀ´¦ÔÚˮƽÏò×óµÄÔÈÇ¿µç³¡ÖУ® ÏÖÓÐÒ»ÖÊÁ¿Îªm¡¢´øÕýµçµÄС»¬¿é£¨¿ÉÊÓΪÖʵ㣩ÖÃÓÚˮƽ¹ìµÀÉÏ£¬»¬¿éÊܵ½µÄµç³¡Á¦´óСΪ
3
4
mg
£¬»¬¿éÓëˮƽ¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.5£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£®
£¨1£©Èô»¬¿é´Óˮƽ¹ìµÀÉϾàÀëBµãs=3RµÄAµãÓɾ²Ö¹ÊÍ·Å£¬»¬¿éµ½´ïÓëÔ²ÐÄOµÈ¸ßµÄCµãʱËÙ¶ÈΪ¶à´ó£¿
£¨2£©ÔÚ£¨1£©µÄÇé¿öÏ£¬Ç󻬿鵽´ïCµãʱÊܵ½¹ìµÀµÄ×÷ÓÃÁ¦´óС£»
£¨3£©¸Ä±äsµÄ´óС£¬Ê¹»¬¿éÇ¡ºÃʼÖÕÑعìµÀ»¬ÐУ¬ÇÒ´ÓGµã·É³ö¹ìµÀ£¬Ç󻬿éÔÚÔ²¹ìµÀÉÏ»¬Ðйý³ÌÖеÄ×îСËٶȴóС£®
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

¾«Ó¢¼Ò½ÌÍø°ë¾¶ÎªrµÄ¾øÔµ¹â»¬Ô²»·¹Ì¶¨ÔÚÊúֱƽÃæÄÚ£¬»·ÉÏÌ×ÓÐÒ»ÖÊÁ¿Îªm£¬´øÕýµçµÄÖé×Ó£¬¿Õ¼ä´æÔÚˮƽÏòÓÒµÄÔÈÇ¿µç³¡£¬ÈçͼËùʾ£¬Öé×ÓËùÊܾ²µçÁ¦ÊÇÆäÖØÁ¦µÄ3/4£¬½«Öé×Ó´Ó»·ÉÏ×îµÍλÖÃAµãÓɾ²Ö¹ÊÍ·Å£¬ÔòÖé×ÓËùÄÜ»ñµÃµÄ×î´ó¶¯ÄÜEkΪ£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸