%0 Journal Article %T ɽÑòëù¾ú²¡ÁÙ´²Ó벡Àíѧ¹Û²ì %A ÍôÕÑÏÍ %A лع·Ò %A Àî¹úÇÚ %A ÇØêÉ %A ¶­Çì°® %A ÕÔÏ×¾ü %A Áõ±ó·æ %J ÉüÐóÊÞҽѧ±¨ %P 83-87 %D 1998 %U http://118.145.16.233/Jweb_xmsy/CN/abstract/abstract9573.shtml