ÈçÏÂͼËùʾ£¬UÐÎÏß¿òabcd´¦ÓÚÔÈÇ¿´Å³¡ÖУ¬´Å³¡µÄ´Å¸ÐӦǿ¶ÈΪB£¬·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÄÚ£¬³¤¶ÈΪLµÄÖ±µ¼ÏßMNÖм䴮ÓÐÒ»¸öµçѹ±í¿ç½ÓÔÚabÓëcdÉÏÇÒÓëab´¹Ö±£¬ËüÃÇÖ®¼äµÄ½Ó´¥ÊÇÍêÈ«¹â»¬µÄ£¬RΪµç×裬CΪµçÈÝÆ÷¡£ÏÖÁîMNÒÔËÙ¶Èv0ÏòÓÒÔÈËÙÔ˶¯£¬ÓÃU±íʾµçѹ±íµÄ¶ÁÊý£¬Q±íʾµçÈÝÆ÷Ëù´øµçºÉÁ¿£¬C±íʾµçÈÝÆ÷µÄµçÈÝ£¬F±íʾ¶ÔMNµÄÀ­Á¦£¬Éèµçѹ±íµÄÌå»ýºÜС£¬ÆäÖÐÏßȦÇиî´Å¸ÐÏ߶ÔMN¼äµÄµçѹµÄÓ°Ïì¿ÉÒÔºöÂÔ²»¼Æ£¬Ôò(    )

A.U£½BLv0            B.F£½0              C.U£½0           D.F£½v02B2L2/R

AB


½âÎö:

ÓÉÌâÖÐͼ·ÖÎö¿ÉÖª£¬Ô­µç·¿ÉµÈЧΪÈçÏÂͼËùʾµÄµç·£¬¹Êµçѹ±íµÄ¶ÁÊýU£½BLv0¡£µ±MNÔÈËÙÔ˶¯Ê±£¬µç·ÖÐÎÞµçÁ÷£¬ÇÒÌâÉèÖÐÒѺöÂÔĦ²ÁÁ¦£¬¹ÊMNËùÊܵÄÀ­Á¦F£½0£¬¹Ê´ð°¸ÎªAB¡£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º»Æ¸ÔÖصã×÷Òµ¡¡¸ß¶þÎïÀí£¨Ï£© ÌâÐÍ£º021

ÈçÏÂͼËùʾ£¬ÔڴŸÐӦǿ¶ÈΪBµÄÔÈÇ¿´Å³¡ÖУ¬·Å×ŵçÁ÷Ç¿¶ÈΪIµÄͨµçUÐνðÊô¿ò£»ÒÑÖªabºÍcd±ß³¤Îª£¬bc±ß³¤Îª£¬Îª×ªÖᣬÔÚͼʾλÖÃʱÏß¿òƽÃæÓë´Å¸ÐÏßƽÐУ¬Õâʱ

[¡¡¡¡]

A£®Í¼aÖеÄUÐοòËùÊÜ´ÅÁ¦¾ØΪ

B£®Í¼bÖеÄUÐοòËùÊÜ´ÅÁ¦¾ØΪ

C£®Í¼aÖеÄUÐοòËùÊÜ´ÅÁ¦¾ØΪÁã

D£®Í¼bÖеÄUÐοòËùÊÜ´ÅÁ¦¾ØΪÁã

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçÏÂͼËùʾ£¬UÐÎÏß¿òabcd´¦ÓÚÔÈÇ¿´Å³¡ÖУ¬´Å³¡µÄ´Å¸ÐӦǿ¶ÈΪB£¬·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÄÚ£¬³¤¶ÈΪLµÄÖ±µ¼ÏßMNÖм䴮ÓÐÒ»¸öµçѹ±í¿ç½ÓÔÚabÓëcdÉÏÇÒÓëab´¹Ö±£¬ËüÃÇÖ®¼äµÄ½Ó´¥ÊÇÍêÈ«¹â»¬µÄ£¬RΪµç×裬CΪµçÈÝÆ÷¡£ÏÖÁîMNÒÔËÙ¶Èv0ÏòÓÒÔÈËÙÔ˶¯£¬ÓÃU±íʾµçѹ±íµÄ¶ÁÊý£¬Q±íʾµçÈÝÆ÷Ëù´øµçºÉÁ¿£¬C±íʾµçÈÝÆ÷µÄµçÈÝ£¬F±íʾ¶ÔMNµÄÀ­Á¦£¬Éèµçѹ±íµÄÌå»ýºÜС£¬ÆäÖÐÏßȦÇиî´Å¸ÐÏ߶ÔMN¼äµÄµçѹµÄÓ°Ïì¿ÉÒÔºöÂÔ²»¼Æ£¬Ôò(    )

A.U£½BLv0            B.F£½0              C.U£½0           D.F£½v02B2L2/R

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

ÈçÏÂͼËùʾ£¬UÐÎÏß¿òabcd´¦ÓÚÔÈÇ¿´Å³¡ÖУ¬´Å³¡µÄ´Å¸ÐӦǿ¶ÈΪB£¬·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÄÚ£¬³¤¶ÈΪLµÄÖ±µ¼ÏßMNÖм䴮ÓÐÒ»¸öµçѹ±í¿ç½ÓÔÚabÓëcdÉÏÇÒÓëab´¹Ö±£¬ËüÃÇÖ®¼äµÄ½Ó´¥ÊÇÍêÈ«¹â»¬µÄ£¬RΪµç×裬CΪµçÈÝÆ÷¡£ÏÖÁîMNÒÔËÙ¶Èv0ÏòÓÒÔÈËÙÔ˶¯£¬ÓÃU±íʾµçѹ±íµÄ¶ÁÊý£¬Q±íʾµçÈÝÆ÷Ëù´øµçºÉÁ¿£¬C±íʾµçÈÝÆ÷µÄµçÈÝ£¬F±íʾ¶ÔMNµÄÀ­Á¦£¬Éèµçѹ±íµÄÌå»ýºÜС£¬ÆäÖÐÏßȦÇиî´Å¸ÐÏ߶ÔMN¼äµÄµçѹµÄÓ°Ïì¿ÉÒÔºöÂÔ²»¼Æ£¬Ôò


  1. A.
    U£½BLv0
  2. B.
    F£½0
  3. C.
    U£½0
  4. D.
    F£½v02B2L2/R

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º¹ãÎ÷ºÓ³ØÊиßÖÐ2009½ì¸ß¿¼Ä£ÄâÊÔ¾í£¨Ò»£© ÌâÐÍ£ºµ¥Ñ¡Ìâ

 ÈçÏÂͼËùʾ£¬Óñ¡½ðÊô°åÖƳÉÖ±½ÇUÐοò£¬UÐοòµÄ¡¢Á½Ãæˮƽ·ÅÖ㬽«Ò»ÖÊÁ¿Îª µÄ´øµçСÇòÓþøԵϸÏßÐü¹ÒÔÚÃæµÄÖÐÑ룬ÈÃÕû¸ö×°ÖÃʼÖÕÖÃÓÚˮƽÔÈÇ¿´Å³¡ÖУ»²¢ÒÔˮƽËÙ¶ÈÏò×óÔÈËÙÔ˶¯£¨´¹Ö±ÓÚB£©¡£UÐοòµÄÊúÖ±°åÓë´¹Ö±£¬ÔÚÕâ¸öÔ˶¯¹ý³ÌÖÐUÐοòµÄ°åµçÊƵͣ¬°åµÄµçÊƸߡ£ÉèÐüÏ߶ÔСÇòµÄÀ­Á¦´óСΪF£¬²»¼Æ¡¢ÃæÓÉÓÚÔ˶¯²úÉúµÄ´Å³¡£¬ÔòÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ

A£®Ò»¶¨ÊÇ                       B£®¿ÉÄÜÊÇ

C£®¿ÉÄÜÊÇ                       D£®¿ÉÄÜÊÇ£¬

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸