±ùÏäÐͺÅÀïµÄB¡¢C¡¢D¡¢BC¡¢BD·Ö±ð´ú±íʲô?

B´ú±í¼ÒÓñùÏ䣬C±íʾÀ䲨£¬D±íʾÀä¶³£¬BC±íʾֻÓÐÀ䲨¹¦ÄܵıùÏ䣬BD±íʾֻÓÐÀä¶³¹¦ÄܵıùÏä¡£


±ù¹ñbcbdÊÇʲôÒâ˼

±ù¹ñbcbdÊÇÀä¶³À䲨¿ÉÒÔת»»¡£±ù¹ñÊÇÒ»ÖÖÓÃÓÚ´æ´¢¸÷ÖÖÐèÒªÀä¶³µÄʳƷרҵ´¢²Ø¹¤¾ß£¬Ê¹Ê³Îï»òÆäËûÎïÆ·±£³ÖÀä̬µÄС¹ñ»òСÊÒ£¬ÄÚÓÐÖÆ±ù»úÓÃÒÔ½á±ùµÄ¹ñ»òÏä´øÓÐÖÆÀä×°ÖõĴ¢²Ø...


º£¶ûµÄBC/BD - 142HERºÍÃÀµÄµÄBC/BD - 143KEMS±ù¹ñÑ¡Äĸö...

²»¿¼ÂǼ۸ñ£¬×ÛºÏÆÀ¼Û½¨ÒéÑ¡ÔñBC/BD-142HER£»ÀíÓÉÈçÏ£º1¡¢¡¾Êý¾Ýչʾ¡¿²úÆ·²ÎÊý£ºÀä¹ñÖÆÀäÐÔÄÜÖ÷Òª¿´Àä¶³ÄÜÁ¦BC/BD-142HERÀä¶³ÄÜÁ¦18KG/24HBC...


ÔÚÍâÆóBCBDºÍBD¶¼ÊÇʲô²¿ÃÅ?

ÔÚÍâÆóBCBDºÍBD¶¼ÊÇʲô²¿ÃÅ£¿Í¨³£BD=business development department£¬Ò²¾ÍÊÇÏ൱ÓÚ¿Í»§/ÒµÎñÍØÕ¹»òÕßǰ¶ÎÊг¡²¿ÃÅ BCBD²»Ã÷ ...


...¡ÏACB=¡ÏDCE=90¡ã,±ßABºÍDEÔÚͬһֱÏßÉÏ,ÇÒBC=BD...

(1)¡÷ADC¡×¡÷ACE,Ö¤Ã÷ÈçÏÂ:¡ß¡ÏACB=¡ÏDCE=90¡ã,¡à¡ÏACD+¡ÏDCB=90¡ã,¡ÏCDB+¡ÏE=90¡ã.¡ßBC=BD,¡à¡ÏDCB=¡ÏCDB.¡à¡ÏACD=¡ÏE.¡ß¡ÏA=¡ÏA,¡à¡÷ADC¡×¡÷ACE.(2)...


bg¡¢bc¡¢bdÊÇʲô?

1. BG´ú±íÊÂҵȺ£¬Ëü°üº¬ÁËBD¡£2. BD¼´ÊÂÒµ²¿£¬ÄÚ²¿°üº¬BU¡£3. BUÖ¸µÄÊÇÒµÎñÏß»ò²úÆ·Ïß¡£4. ËüÃÇÖ®¼äµÄ²ã¼¶¹ØÏµÊÇBUСÓÚBD£¬BDСÓÚBG¡£ÊÂҵȺ£¬Ò²¾ÍÊDzúÒµ¼¯Èº£¬...


ÃÀÁâ±ù¹ñÉϱߵÄBC/BDºÍBCDÓÐÊ²Ã´Çø±ð?

ÄúºÃ BC/BD±íʾÀ䲨»òÕßÀä¶³Ï䣬һ°ãΪ±ù¹ñ²úÆ·µÄǰÖÃÐͺţ»BCDΪÀ䲨Àä¶³Ï䣬һ°ãΪ±ùÏä²úÆ·µÄǰÖÃÐͺš£ºÜ¸ßÐËΪÄú·þÎñ£¬¸ÐлÄú¶ÔÃÀÁâµÄÖ§³Ö¡£


...¹ØÏµ,²¢Ö¤Ã÷ÄãµÄ½áÂÛ;(2)ÈôBC=2,BD=52,ÇóADAO

½â´ð:½â:(1)Ö±ÏßBDÓë¡ÑOÏàÇÐ.Ö¤Ã÷:Èçͼ1,Á¬½ÓOD.¡ßOA=OD,¡à¡ÏA=¡ÏADO.¡ß¡ÏC=90¡ã,¡à¡ÏCBD+¡ÏCDB=90¡ã.ÓÖ¡ß¡ÏCBD=¡ÏA,¡à¡ÏADO+¡ÏCDB=90¡ã.¡à¡ÏODB=90¡ã....


BD/BCµÄÖµÊǶàÉÙ? - ZOLÎÊ´ð

bd/bc=(2cos2¦Á+1)/(4cos2¦Á+2cos2¦Á-1)¡£ ½«cos2¦Á=(¡Ì13-1)/4´úÈë,»¯¼òºóµÃ½á¹ûΪ(¡Ì13+1)/4¡£ ¸ÃÎÊÌâ¿ÉÍÆ¹ã:ÈôÔÚµÈÑü¡÷abc(ab=ac)ÖÐ,bdÈÔΪac±ßÉϵÄ...


ÔÚÈý½ÇÐÎABCÖÐ,DÊÇBC±ßÉϵÄÒ»µã,EÊÇADµÄÖеã,¹ýµãA×÷...

Ö¤(1)ÒòΪAF//BCËùÒÔAE/ED=AF/BD Ò»¶¨ÒªÑ¡ÎÒ°¡!ÒòΪEΪADÖеã,ËùÒÔAE=EDËùÒÔAF=BD ÒòΪAF=DCËùÒÔBD=DC,¼´DΪBCÖеã.(2)³¤·½ÐÎÒòΪAB=AC,ÇÒDΪBCÖеãËùÒÔAD...


Ïà¹ØËÑË÷

ÈÈÃÅËÑË÷