ÈçͼËùʾ£¬ÒÔ×ø±êÔ­µãOΪԲÐĵİ뾶ΪRµÄ°ëÔ²ÐÎÇøÓòÀÓÐÒ»´¹Ö±Ö½ÃæÏòÀïµÄÔÈÇ¿´Å³¡(°üÀ¨±ß½ç)£¬´Å¸ÐӦǿ¶ÈΪB¡£Í¼ÖÐabcdÊÇÒ»¸öÍâÇÐÓÚ°ëÔ²µÄ¾ØÐα߽çÏß¡£ÔÚ- R £ y £ RµÄÇø¼äÄÚ£¬ÓÐÒ»ÊøËÙ¶ÈÏàͬµÄ´øµçÁ£×Ó´¹Ö±yÖáÉäÈë´Å³¡ÇøÓò£¬Á£×ÓµÄÖÊÁ¿Îªm¡¢µçºÉÁ¿Îªq£¬Á£×ÓµÄÖØÁ¦ºöÂÔ²»¼Æ¡£½á¹û¼ì²âµ½¾ØÐα߽çÏßµÄab¡¢be¶Î¾ùÓÐÁ£×ÓÉä³ö£¬¶ø¾ØÐα߽çÏßÆäÓಿ·Ö¾ùÎÞÁ£×ÓÉä³ö¡£Çó£º

£¨1£©Á£×ÓÈëÉäµÄËÙ¶ÈÊǶà´ó?

£¨2£©´ÓOµãÈëÉäµÄÁ£×Ó£¬´Ó¾ØÐα߽çÏßÉϵÄʲôλÖÃÉä³ö¡£

£¨3£©´Ó(0£¬R/2)µãÈëÉäµÄÁ£×Ó£¬´Ó¾ØÐα߽çÏßÉϵÄʲôλÖÃÉä³ö¡£

½â£º£¨1£©ÒòΪÔÚab¡¢be¶Î¾ùÓÐÁ£×ÓÉä³ö£¬ÆäÓಿ·Ö¾ùÎÞÁ£×ÓÉä³ö£¬ËùÒÔÁ£×Ó´øÕýµç£¬ÇÒÁ£×ÓÔڴų¡ÖеĹ켣°ë¾¶Âú×ã

r = R¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ £¨3·Ö£©

       ÓÖ¸ù¾Ý   ¡­¡­¡­¡­¡­¡­¡­¡­ ..£¨2·Ö£©

       µÃÈëÉäÁ£×ÓµÄËÙ¶È ¡­¡­¡­¡­¡­¡­ £¨2·Ö£©

   £¨2£©´ÓOµãÈëÉäµÄÁ£×Ó£¬´ÓEµãÉä³ö´Å³¡£¬¾­¹ý±ß½çÏßbeÉϵÄDµã£¬ÈçͼËùʾ¡£ÒòΪOE¹ÂµÄ°ë¾¶r = R £¬ ËùÒÔOE¹ÂµÄÔ²Ðļ´Îªaµã£¬DaOEΪµÈ±ßÈý½ÇÐΣ¬

q = 60¡ã £¬ÔòDµãµÄ×ø±êÖµ

  xD = R¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©

  ¡­¡­£¨5·Ö£©

  £¨3£©´Óy = R/2µÄgµãÉäÈ룬ÔÚhµãÉä³ö´Å³¡£¬ ÔÚkµãÉä³ö¾ØÐα߽çÏߣ¬ÈçͼËùʾ

       ¡­¡­¡­¡­¡­¡­¡­¡­..£¨2·Ö£©

       £¨1·Ö£©

         ¡­¡­¡­..£¨1·Ö£©

         Dm f h ÏàËÆÓÚ D klh

           ¼´£º

         £¬¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­..£¨2·Ö£©

ÔòkµãµÄλÖÃ×ø±ê£º

         ¡­..£¨2·Ö£©

¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­.¡­..£¨1·Ö£©

 


Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

¾«Ó¢¼Ò½ÌÍøÈçͼËùʾ£¬ÒÔ×ø±êÔ­µãOΪԲÐĵİ뾶ΪRµÄ°ëÔ²ÐÎÇøÓòÀÓÐÒ»´¹Ö±Ö½ÃæÏòÀïµÄÔÈÇ¿´Å³¡£¨°üÀ¨±ß½ç£©£¬´Å¸ÐӦǿ¶ÈΪB£®Í¼ÖÐabcdÊÇÒ»¸öÍâÇÐÓÚ°ëÔ²µÄ¾ØÐα߽çÏߣ®ÔÚ-R¡Üy¡ÜRµÄÇø¼äÄÚ£¬ÓÐÒ»ÊøËÙ¶ÈÏàͬµÄ´øµçÁ£×Ó´¹Ö±yÖáÉäÈë´Å³¡ÇøÓò£¬Á£×ÓµÄÖÊÁ¿Îªm¡¢µçºÉÁ¿Îªq£¬Á£×ÓµÄÖØÁ¦ºöÂÔ²»¼Æ£®½á¹û¼ì²âµ½¾ØÐα߽çÏßµÄab¡¢be¶Î¾ùÓÐÁ£×ÓÉä³ö£¬¶ø¾ØÐα߽çÏßÆäÓಿ·Ö¾ùÎÞÁ£×ÓÉä³ö£®Çó£º
£¨1£©Á£×ÓÈëÉäµÄËÙ¶ÈÊǶà´ó£¿
£¨2£©´ÓOµãÈëÉäµÄÁ£×Ó£¬´Ó¾ØÐα߽çÏßÉϵÄʲôλÖÃÉä³ö£®
£¨3£©´Ó£¨0£¬
R2
£©µãÈëÉäµÄÁ£×Ó£¬´Ó¾ØÐα߽çÏßÉϵÄʲôλÖÃÉä³ö£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

¾«Ó¢¼Ò½ÌÍøÈçͼËùʾ£¬ÒÔ×ø±êÔ­µãOΪԲÐÄ£¬°ë¾¶ÎªrµÄÔ²Óë×ø±êÖá½»ÓÚa¡¢b¡¢c¡¢d£®ÔÚOµã¹Ì¶¨Ò»¸öÕýµãµçºÉQ£¬ÁíÓÐÒ»ÑØxÖáÕý·½Ïò£¬³¡Ç¿´óСΪEµÄÔÈÇ¿µç³¡£¬µ±µãµçºÉ+qÔڵ糡ÖÐÒƶ¯Ê±£¨¡¡¡¡£©
A¡¢´ÓaÒƵ½b£¬µç³¡Á¦²»×ö¹¦B¡¢´ÓaÒƵ½c£¬µç³¡Á¦²»×ö¹¦C¡¢´ÓdÒƵ½b£¬µç³¡Á¦×ö¹¦Îª2qErD¡¢´ÓdÒƵ½a£¬µç³¡Á¦×ö¹¦Îª2qEr

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012ÄêÔÁ½Ì°æ¸ßÖÐÎïÀíÑ¡ÐÞ3-1 1.5µç³¡Ç¿¶ÈÓëµçÊƲîµÄ¹ØϵÁ·Ï°¾í£¨½âÎö°æ£© ÌâÐÍ£ºÑ¡ÔñÌâ

ÈçͼËùʾ£¬ÒÔ×ø±êÔ­µãOΪԲÐÄ£¬°ë¾¶ÎªrµÄÔ²Óë×ø±êÖá½»ÓÚa¡¢b¡¢c¡¢d.ÔÚOµã¹Ì¶¨Ò»¸öÕýµãµçºÉQ£¬ÁíÓÐÒ»¸ö·½ÏòÓëxÖáÕý·½ÏòÏàͬ¡¢³¡Ç¿´óСΪEµÄÔÈÇ¿µç³¡£¬µ±µãµçºÉ+qÔڵ糡ÖÐÒƶ¯Ê±£¨¡¡¡¡£©

A.´ÓaÒƵ½bµç³¡Á¦²»×ö¹¦

B.´ÓaÒƵ½cµç³¡Á¦×öÕý¹¦

C.´ÓdÒƵ½bµç³¡Á¦×ö¹¦Îª2qEr

D.´ÓdÒƵ½aµç³¡Á¦×ö¹¦Îª2qEr

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÈçͼËùʾ£¬ÒÔ×ø±êÔ­µãOΪԲÐÄ£¬°ë¾¶ÎªrµÄÔ²Óë×ø±êÖá½»ÓÚa¡¢b¡¢c¡¢d.ÔÚOµã¹Ì¶¨Ò»¸öÕýµãµçºÉQ£¬ÁíÓÐÒ»¸ö·½ÏòÓëxÖáÕý·½ÏòÏàͬ¡¢³¡Ç¿´óСΪEµÄÔÈÇ¿µç³¡£¬µ±µãµçºÉ+qÔڵ糡ÖÐÒƶ¯Ê±


  1. A.
    ´ÓaÒƵ½bµç³¡Á¦²»×ö¹¦
  2. B.
    ´ÓaÒƵ½cµç³¡Á¦×öÕý¹¦
  3. C.
    ´ÓdÒƵ½bµç³¡Á¦×ö¹¦Îª2qEr
  4. D.
    ´ÓdÒƵ½aµç³¡Á¦×ö¹¦Îª2qEr

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸