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2009-03-11
2007-12-12
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2009 ¦~ 3 ¤ë 11 ¤é  ¬P´Á¤T   ´¸¤Ñ


2009-03-11 ¤ÀÃþ: ¥¼¤ÀÃþ

¹q¬y廻¸ô¤¤¡A¨âÂIªº¹q¦ì¤À§O¬°V1©MV2=-5V¡A°Ý³o¨âÂIªº¹qÀ£¬O¦h¤Ö¡H

V=10-(-5)

  =10+5

  =15V

 

 



2007 ¦~ 12 ¤ë 12 ¤é  ¬P´Á¤T   ´¸¤Ñ


2007-12-12 ¤ÀÃþ: ¥¼¤ÀÃþ

hi, today is verycool