ʵÑé¡°ÓÃDISÑо¿»úеÄÜÊغ㶨ÂÉ¡±µÄ×°ÖÃÈçÏÂͼaËùʾ£¬Ä³×éͬѧÔÚÒ»´ÎʵÑéÖУ¬Ñ¡ÔñDISÒÔͼÏó·½Ê½ÏÔʾʵÑéµÄ½á¹û£¬ËùÏÔʾµÄͼÏóÈçÏÂͼbËùʾ£®Í¼ÏóµÄºáÖá±íʾСÇò¾àDµãµÄ¸ß¶Èh£¬×ÝÖá±íʾ°ÚÇòµÄÖØÁ¦ÊÆÄÜEP¡¢¶¯ÄÜEK»ò»úеÄÜE£¬Í¼bµÄͼÏóÖУ¬±íʾСÇòµÄÖØÁ¦ÊÆÄÜEP¡¢¶¯ÄÜEK»ò»úеÄÜEËæСÇò¾àDµãµÄ¸ß¶Èh±ä»¯¹ØϵµÄͼÏß·Ö±ðÊÇ
A
A

A£®±û¡¢ÒÒ¡¢¼×
B£®ÒÒ¡¢¼×¡¢±û
C£®¼×¡¢ÒÒ¡¢±û
D£®±û¡¢¼×¡¢ÒÒ£®
·ÖÎö£º¸ù¾ÝСÇòÔÚ¾²Ö¹Êͷźó£¬ÖØÁ¦ÔÚ×öÕý¹¦£¬ÖØÁ¦ÊÆÄÜEP²»¶Ï¼õÉÙ£¬¶¯ÄÜEK²»¶ÏÔö¼Ó£¬¶øÖØÁ¦ÊÆÄܺͶ¯ÄܵÄ×ÜÁ¿¼´»úеÄܲ»±äÀ´Ñ¡ÔñͼÏߣ®
½â´ð£º½â£ºÐ¡ÇòÔÚ¾²Ö¹Êͷźó£¬ÖØÁ¦ÔÚ×öÕý¹¦£¬ÖØÁ¦ÊÆÄÜEP²»¶Ï¼õÉÙ£¬¶¯ÄÜEK²»¶ÏÔö¼Ó£¬Í¨¹ý¹Û²ìͼÏóbÌصãÒ×Öª£º±û±íʾÖØÁ¦ÊÆÄÜEP£¬ÒÒ±íʾ¶¯ÄÜEK£¬¼×±íʾ»úеÄÜE£®
¹Ê´ð°¸Îª£ºA
µãÆÀ£º±¾Ìâ±È½ÏÐÂÓ±£¬Òª×¢Òâ½áºÏʵÑéµÄÔ­Àí½øÐзÖÎö£¬´Ó¶øÕÒ³ö·ûºÏ¸ÃʵÑéµÄÔ­Àí£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼΪÓÃDIS£¨Î»ÒÆ´«¸ÐÆ÷¡¢Êý¾Ý²É¼¯Æ÷¡¢¼Æ Ëã»ú£©Ñо¿¼ÓËٶȺÍÁ¦µÄ¹ØϵµÄʵÑé×°Öã®ÊµÑéÇ°ÒÑƽºâĦ²ÁÁ¦£®
¢ÙʵÑéÖвÉÓÿØÖƱäÁ¿·¨£¬Ó¦±£³Ö
С³µµÄÖÊÁ¿
С³µµÄÖÊÁ¿
²»±ä£¬Óù³ÂëËùÊܵÄÖØÁ¦×÷ΪС³µËùÊܵÄ
ºÏÁ¦
ºÏÁ¦
£¬ÓÃDIS²âС³µµÄ¼ÓËٶȣ®
¢Ú¸Ä±äËù¹Ò¹³ÂëµÄÊýÁ¿£¬¶à´ÎÖظ´²âÁ¿£®¸ù¾Ý²âµÃµÄ¶à×éÊý¾Ý¿É »­³öa-F¹ØϵͼÏߣ¨ÈçͼËùʾ£©£®·ÖÎö´ËͼÏßµÄOA¶Î¿ÉµÃ³öµÄʵÑé½áÂÛÊÇ
С³µµÄÖÊÁ¿Ò»¶¨£¬¼ÓËÙaÓëºÏÁ¦F³ÉÕý±È
С³µµÄÖÊÁ¿Ò»¶¨£¬¼ÓËÙaÓëºÏÁ¦F³ÉÕý±È
£®´ËͼÏßµÄAB¶ÎÃ÷ÏÔÆ«ÀëÖ±Ïߣ¬Ôì³É´ËÎó²îµÄÖ÷ÒªÔ­ÒòÊÇ£º
C
C

A£®Ð¡³µÓë¹ìµÀÖ®¼ä´æÔÚĦ²Á
B£®µ¼¹ì±£³ÖÁËˮƽ״̬
C£®Ëù¹Ò¹³ÂëµÄ×ÜÖÊÁ¿Ì«´ó
D£®ËùÓÃС³µµÄÖÊÁ¿Ì«´ó£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÔĶÁÀí½â

¾«Ó¢¼Ò½ÌÍø£¨1£©Ò»¸ö¾ØÐÎÏßȦÔÚÔÈÇ¿´Å³¡ÖÐÔÈËÙת¶¯Ê±²úÉú½»±äµçÁ÷£¬Æäµç¶¯ÊƱí´ïʽΪe=311sin314t£¨V£©£®ÒÑÖªÏßȦÔÑÊýÊÇ100£¬Ãæ»ýΪ0.02m2£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈB=
 
T£¨±£ÁôһλÓÐЧÊý×Ö£©£¬µ±ÏßȦ´ÓÖÐÐÔÃ濪ʼת¹ý3¦Ð/4 Ê±£¬µç¶¯ÊƵÄ˲ʱֵΪ
 
V£®
£¨2£©ÈçͼΪÓÃDIS£¨Î»ÒÆ´«¸ÐÆ÷¡¢Êý¾Ý²É¼¯Æ÷¡¢¼Æ Ëã»ú£©Ñо¿¼ÓËٶȺÍÁ¦µÄ¹ØϵµÄʵÑé×°Öã®ÊµÑéÇ°ÒÑƽºâĦ²ÁÁ¦£®¾«Ó¢¼Ò½ÌÍø
¢ÙʵÑéÖвÉÓÿØÖƱäÁ¿·¨£¬Ó¦±£³Ö
 
²»±ä£¬Óù³  ÂëËùÊܵÄÖØÁ¦×÷ΪС³µËùÊܵÄ
 
£¬ÓÃDIS²âС³µµÄ¼ÓËٶȣ®
¢Ú¸Ä±äËù¹Ò¹³ÂëµÄÊýÁ¿£¬¶à´ÎÖظ´²âÁ¿£®¸ù¾Ý²âµÃµÄ¶à×éÊý¾Ý¿É »­³öa-F¹ØϵͼÏߣ¨ÈçͼËùʾ£©£®·ÖÎö´ËͼÏßµÄOA¶Î¿ÉµÃ³öµÄʵÑé½áÂÛÊÇ
 
£®´ËͼÏßµÄAB¶ÎÃ÷ÏÔÆ«ÀëÖ±Ïߣ¬Ôì³É´ËÎó²îµÄÖ÷ÒªÔ­ÒòÊÇ£º
A£®Ð¡³µÓë¹ìµÀÖ®¼ä´æÔÚĦ²Á    B£®µ¼¹ì±£³ÖÁËˮƽ״̬
C£®Ëù¹Ò¹³ÂëµÄ×ÜÖÊÁ¿Ì«´ó      D£®ËùÓÃС³µµÄÖÊÁ¿Ì«´ó
£¨3£©ÔÚ¡°²âµç³ØµÄµç¶¯ÊƺÍÄÚ×衱µÄʵÑéÖУ¬²âÁ¿¶ÔÏóΪ1½Úеĸɵç³Ø£®Ä³Í¬Ñ§ÓÃͼ¼×Ëùʾµç·²âÁ¿Ê±£¬Ôڽϴó·¶Î§ÄÚµ÷½Ú»¬¶¯±ä×èÆ÷£¬·¢ÏÖµçѹ±í¶ÁÊý±ä»¯²»Ã÷ÏÔ£¬¹À¼ÆÊÇÒòΪµç³Ø½ÏÐÂÔì³É£®ÎªÁËÌá¸ßʵÑ龫¶È£¬¸Ãͬѧ²ÉÓÃͼÒÒËùʾµç·£®ÊµÑéÊÒÌṩµÄÆ÷²ÄÓУºÁ¿³Ì3VµÄµçѹ±í£»Á¿³Ì0.6AµÄµçÁ÷±í£¨¾ßÓÐÒ»¶¨ÄÚ×裩£»¶¨Öµµç×èR0£¨×èֵδ֪£¬Ô¼¼¸Å·Ä·£©£»»¬¶¯±ä×èÆ÷R1£¨0¡«10¦¸£©£¬»¬¶¯±ä×èÆ÷R2£¨0¡«200¦¸£©£»µ¥µ¶µ¥ÖÀ¿ª¹ØS1¡¢µ¥µ¶Ë«ÖÀ¿ª¹ØS2£¬µ¼ÏßÈô¸É£®¾«Ó¢¼Ò½ÌÍø
¢ÙÒÒµç·ÖУ¬¼Ó½Óµç×èR0ÓÐÁ½·½ÃæµÄ×÷Óã¬Ò»ÊÇ·½±ãʵÑé²Ù×÷ºÍÊý¾Ý²âÁ¿£¬¶þÊÇ
 
£®
¢ÚΪ·½±ãʵÑéµ÷½ÚÇÒÄܽÏ׼ȷµØ½øÐвâÁ¿£¬»¬¶¯±ä×èÆ÷ӦѡÓÃ
 
£¨ÌîR1»òR2£©£®
¢Û¿ªÊ¼ÊµÑé֮ǰ£¬S1¡¢S2¶¼´¦ÓڶϿª×´Ì¬£®ÏÖÔÚ¿ªÊ¼ÊµÑ飺
A¡¢±ÕºÏS1£¬S2´òÏò1£¬²âµÃµçѹ±íµÄ¶ÁÊýU0£¬µçÁ÷±íµÄ¶ÁÊýΪI0£»
B¡¢±ÕºÏS1£¬S2´òÏò2£¬¸Ä±ä»¬¶¯±ä×èÆ÷µÄ×èÖµ£¬µ±µçÁ÷±í¶ÁÊýΪI1ʱ£¬µçѹ±í¶ÁÊýΪU1£»µ±µçÁ÷±í¶ÁÊýΪI2ʱ£¬µçѹ±í¶ÁÊýΪU2£®Ôòеç³Øµç¶¯ÊƵıí´ïʽΪE=
 
£¬ÄÚ×èµÄ±í´ïʽr=
 
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2010-2011ѧÄêÌì½òÊÐÄÏ¿ªÇø¸ßÈýһģ¿¼ÊÔÀí×ÛÎïÀí²¿·Ö ÌâÐÍ£ºÊµÑéÌâ

£¨1£©£¨4·Ö£©Ò»¸ö¾ØÐÎÏßȦÔÚÔÈÇ¿´Å³¡ÖÐÔÈËÙת¶¯Ê±²úÉú½»±äµçÁ÷£¬Æäµç¶¯ÊƱí´ïʽΪe = 311sin314t(v)£®ÒÑÖªÏßȦÔÑÊýÊÇ100£¬Ãæ»ýΪ0.02m2£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶È       B =        T(±£ÁôһλÓÐЧÊý×Ö)£¬µ±ÏßȦ´ÓÖÐÐÔÃ濪ʼת¹ý3¦Ð/4 ʱ£¬µç¶¯ÊƵÄ˲ʱֵΪ    V£®

£¨2£©£¨6·Ö£©ÈçͼΪÓÃDIS£¨Î»ÒÆ´«¸ÐÆ÷¡¢Êý¾Ý²É¼¯Æ÷¡¢¼Æ Ëã»ú£©Ñо¿¼ÓËٶȺÍÁ¦µÄ¹ØϵµÄʵÑé×°Öã®ÊµÑéÇ°ÒÑƽºâĦ²ÁÁ¦£®

¢ÙʵÑéÖвÉÓÿØÖƱäÁ¿·¨£¬Ó¦±£³Ö___²»±ä£¬Óù³  ÂëËùÊܵÄÖØÁ¦×÷ΪС³µËùÊܵÄ___£¬ÓÃDIS²âС³µµÄ¼ÓËٶȣ®

¢Ú¸Ä±äËù¹Ò¹³ÂëµÄÊýÁ¿£¬¶à´ÎÖظ´²âÁ¿¡£¸ù¾Ý²âµÃµÄ¶à×éÊý¾Ý¿É »­³öa-F¹ØϵͼÏߣ¨ÈçͼËùʾ£©£®·ÖÎö´ËͼÏßµÄOA¶Î¿ÉµÃ³öµÄʵÑé½áÂÛÊÇ______£®´ËͼÏßµÄAB¶ÎÃ÷ÏÔÆ«ÀëÖ±Ïߣ¬Ôì³É´ËÎó²îµÄÖ÷ÒªÔ­ÒòÊÇ£º

A£®Ð¡³µÓë¹ìµÀÖ®¼ä´æÔÚĦ²Á       B£®µ¼¹ì±£³ÖÁËˮƽ״̬

C£®Ëù¹Ò¹³ÂëµÄ×ÜÖÊÁ¿Ì«´ó         D£®ËùÓÃС³µµÄÖÊÁ¿Ì«´ó

£¨3£©(8·Ö)ÔÚ¡°²âµç³ØµÄµç¶¯ÊƺÍÄÚ×衱µÄʵÑéÖУ¬²âÁ¿¶ÔÏóΪ1½Úеĸɵç³Ø£®Ä³Í¬Ñ§ÓÃͼ¼×Ëùʾµç·²âÁ¿Ê±£¬Ôڽϴó·¶Î§ÄÚµ÷½Ú»¬¶¯±ä×èÆ÷£¬·¢ÏÖµçѹ±í¶ÁÊý±ä»¯²»Ã÷ÏÔ£¬¹À¼ÆÊÇÒòΪµç³Ø½ÏÐÂÔì³É¡£ÎªÁËÌá¸ßʵÑ龫¶È£¬¸Ãͬѧ²ÉÓÃͼÒÒËùʾµç·£®ÊµÑéÊÒÌṩµÄÆ÷²ÄÓУº Á¿³Ì3VµÄµçѹ±í£»Á¿³Ì0.6AµÄµçÁ÷±í£¨¾ßÓÐÒ»¶¨ÄÚ×裩£»¶¨Öµµç×èR0£¨×èֵδ֪£¬Ô¼¼¸Å·Ä·£©£»»¬¶¯±ä×èÆ÷R1£¨0 ~ 10¦¸£©£¬»¬¶¯±ä×èÆ÷R2£¨0 ~ 200¦¸£©£»µ¥µ¶µ¥ÖÀ¿ª¹ØS1¡¢µ¥µ¶Ë«ÖÀ¿ª¹ØS2£¬µ¼ÏßÈô¸É£®

   

¢ÙÒÒµç·ÖУ¬¼Ó½Óµç×èR0ÓÐÁ½·½ÃæµÄ×÷Óã¬Ò»ÊÇ·½±ãʵÑé²Ù×÷ºÍÊý¾Ý²âÁ¿£¬¶þÊÇ___  £®

¢ÚΪ·½±ãʵÑéµ÷½ÚÇÒÄܽÏ׼ȷµØ½øÐвâÁ¿£¬»¬¶¯±ä×èÆ÷ӦѡÓà       £¨ÌîR1»òR2£©£®

¢Û¿ªÊ¼ÊµÑé֮ǰ£¬S1¡¢S2¶¼´¦ÓڶϿª×´Ì¬£®ÏÖÔÚ¿ªÊ¼ÊµÑ飺

A¡¢±ÕºÏS1£¬S2´òÏò£±£¬²âµÃµçѹ±íµÄ¶ÁÊý£Õ0£¬µçÁ÷±íµÄ¶ÁÊýΪ£É0£»

B¡¢±ÕºÏS1£¬S2´òÏò2£¬¸Ä±ä»¬¶¯±ä×èÆ÷µÄ×èÖµ£¬µ±µçÁ÷±í¶ÁÊýΪI1ʱ£¬µçѹ±í¶ÁÊýΪU1£»µ±µçÁ÷±í¶ÁÊýΪI2ʱ£¬µçѹ±í¶ÁÊýΪU2£®Ôòеç³Øµç¶¯ÊƵıí´ïʽΪE =        £¬ÄÚ×èµÄ±í´ïʽr =        £®

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼΪÓÃDIS£¨Î»ÒÆ´«¸ÐÆ÷¡¢Êý¾Ý²É¼¯Æ÷¡¢¼Æ Ëã»ú£©Ñо¿¼ÓËٶȺÍÁ¦µÄ¹ØϵµÄʵÑé×°Öã®ÊµÑéÇ°ÒÑƽºâĦ²ÁÁ¦£®

¢ÙʵÑéÖвÉÓÿØÖƱäÁ¿·¨£¬Ó¦±£³Ö_______²»±ä£¬Óù³ÂëËùÊܵÄÖØÁ¦×÷ΪС³µËùÊܵÄ________£¬ÓÃDIS²âС³µµÄ¼ÓËٶȣ®

¢Ú¸Ä±äËù¹Ò¹³ÂëµÄÊýÁ¿£¬¶à´ÎÖظ´²âÁ¿¡£¸ù¾Ý²âµÃµÄ¶à×éÊý¾Ý¿É »­³öa-F¹ØϵͼÏߣ¨ÈçͼËùʾ£©£®·ÖÎö´ËͼÏßµÄOA¶Î¿ÉµÃ³öµÄʵÑé½áÂÛÊÇ______________£®´ËͼÏßµÄAB¶ÎÃ÷ÏÔÆ«ÀëÖ±Ïߣ¬Ôì³É´ËÎó²îµÄÖ÷ÒªÔ­ÒòÊÇ£º

A£®Ð¡³µÓë¹ìµÀÖ®¼ä´æÔÚĦ²Á       

B£®µ¼¹ì±£³ÖÁËˮƽ״̬

C£®Ëù¹Ò¹³ÂëµÄ×ÜÖÊÁ¿Ì«´ó             

D£®ËùÓÃС³µµÄÖÊÁ¿Ì«´ó

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2011ÄêÌì½òÊÐÄÏ¿ªÇø¸ß¿¼ÎïÀíһģÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º½â´ðÌâ

£¨1£©Ò»¸ö¾ØÐÎÏßȦÔÚÔÈÇ¿´Å³¡ÖÐÔÈËÙת¶¯Ê±²úÉú½»±äµçÁ÷£¬Æäµç¶¯ÊƱí´ïʽΪe=311sin314t£¨V£©£®ÒÑÖªÏßȦÔÑÊýÊÇ100£¬Ãæ»ýΪ0.02m2£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈB=______T£¨±£ÁôһλÓÐЧÊý×Ö£©£¬µ±ÏßȦ´ÓÖÐÐÔÃ濪ʼת¹ý3¦Ð/4 Ê±£¬µç¶¯ÊƵÄ˲ʱֵΪ______V£®
£¨2£©ÈçͼΪÓÃDIS£¨Î»ÒÆ´«¸ÐÆ÷¡¢Êý¾Ý²É¼¯Æ÷¡¢¼Æ Ëã»ú£©Ñо¿¼ÓËٶȺÍÁ¦µÄ¹ØϵµÄʵÑé×°Öã®ÊµÑéÇ°ÒÑƽºâĦ²ÁÁ¦£®
¢ÙʵÑéÖвÉÓÿØÖƱäÁ¿·¨£¬Ó¦±£³Ö______²»±ä£¬Óù³  ÂëËùÊܵÄÖØÁ¦×÷ΪС³µËùÊܵÄ______£¬ÓÃDIS²âС³µµÄ¼ÓËٶȣ®
¢Ú¸Ä±äËù¹Ò¹³ÂëµÄÊýÁ¿£¬¶à´ÎÖظ´²âÁ¿£®¸ù¾Ý²âµÃµÄ¶à×éÊý¾Ý¿É »­³öa-F¹ØϵͼÏߣ¨ÈçͼËùʾ£©£®·ÖÎö´ËͼÏßµÄOA¶Î¿ÉµÃ³öµÄʵÑé½áÂÛÊÇ______£®´ËͼÏßµÄAB¶ÎÃ÷ÏÔÆ«ÀëÖ±Ïߣ¬Ôì³É´ËÎó²îµÄÖ÷ÒªÔ­ÒòÊÇ£º
A£®Ð¡³µÓë¹ìµÀÖ®¼ä´æÔÚĦ²Á    B£®µ¼¹ì±£³ÖÁËˮƽ״̬
C£®Ëù¹Ò¹³ÂëµÄ×ÜÖÊÁ¿Ì«´ó      D£®ËùÓÃС³µµÄÖÊÁ¿Ì«´ó
£¨3£©ÔÚ¡°²âµç³ØµÄµç¶¯ÊƺÍÄÚ×衱µÄʵÑéÖУ¬²âÁ¿¶ÔÏóΪ1½Úеĸɵç³Ø£®Ä³Í¬Ñ§ÓÃͼ¼×Ëùʾµç·²âÁ¿Ê±£¬Ôڽϴó·¶Î§ÄÚµ÷½Ú»¬¶¯±ä×èÆ÷£¬·¢ÏÖµçѹ±í¶ÁÊý±ä»¯²»Ã÷ÏÔ£¬¹À¼ÆÊÇÒòΪµç³Ø½ÏÐÂÔì³É£®ÎªÁËÌá¸ßʵÑ龫¶È£¬¸Ãͬѧ²ÉÓÃͼÒÒËùʾµç·£®ÊµÑéÊÒÌṩµÄÆ÷²ÄÓУºÁ¿³Ì3VµÄµçѹ±í£»Á¿³Ì0.6AµÄµçÁ÷±í£¨¾ßÓÐÒ»¶¨ÄÚ×裩£»¶¨Öµµç×èR£¨×èֵδ֪£¬Ô¼¼¸Å·Ä·£©£»»¬¶¯±ä×èÆ÷R1£¨0¡«10¦¸£©£¬»¬¶¯±ä×èÆ÷R2£¨0¡«200¦¸£©£»µ¥µ¶µ¥ÖÀ¿ª¹ØS1¡¢µ¥µ¶Ë«ÖÀ¿ª¹ØS2£¬µ¼ÏßÈô¸É£®
¢ÙÒÒµç·ÖУ¬¼Ó½Óµç×èRÓÐÁ½·½ÃæµÄ×÷Óã¬Ò»ÊÇ·½±ãʵÑé²Ù×÷ºÍÊý¾Ý²âÁ¿£¬¶þÊÇ______£®
¢ÚΪ·½±ãʵÑéµ÷½ÚÇÒÄܽÏ׼ȷµØ½øÐвâÁ¿£¬»¬¶¯±ä×èÆ÷ӦѡÓÃ______£¨ÌîR1»òR2£©£®
¢Û¿ªÊ¼ÊµÑé֮ǰ£¬S1¡¢S2¶¼´¦ÓڶϿª×´Ì¬£®ÏÖÔÚ¿ªÊ¼ÊµÑ飺
A¡¢±ÕºÏS1£¬S2´òÏò1£¬²âµÃµçѹ±íµÄ¶ÁÊýU£¬µçÁ÷±íµÄ¶ÁÊýΪI£»
B¡¢±ÕºÏS1£¬S2´òÏò2£¬¸Ä±ä»¬¶¯±ä×èÆ÷µÄ×èÖµ£¬µ±µçÁ÷±í¶ÁÊýΪI1ʱ£¬µçѹ±í¶ÁÊýΪU1£»µ±µçÁ÷±í¶ÁÊýΪI2ʱ£¬µçѹ±í¶ÁÊýΪU2£®Ôòеç³Øµç¶¯ÊƵıí´ïʽΪE=______£¬ÄÚ×èµÄ±í´ïʽr=______£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸