<P>衷心感谢timesyy 给予的无私的帮助,谢谢……<A href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDC-4RWC50V-1&_user=10&_coverDate=09%2F30%2F2008&_rdoc=27&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235979%232008%23999759994%23693282%23FLA%23display%23Volume)&_cdi=5979&_sort=d&_docanchor=&_ct=45&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=4cbc8e0b2db3512613b20d4c14572523"></A></P>
<P align=right><FONT color=#000066>[此贴子已经被作者于2008-7-22 16:01:06编辑过]</FONT></P>