%0 Journal Article %T Ǭ¡³¯·èººÎÄ×ÖÓü̽Îö %A ¹ù³É¿µ %J ÇåÊ·Ñо¿ %P 18-23 %D 1988 %X £¿ %U http://qsyj.iqh.net.cn/CN/abstract/abstract649.shtml