<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&amp;_udi=B6VDC-4RWC50V-1&amp;_user=10&amp;_coverDate=09%2F30%2F2008&amp;_rdoc=27&amp;_fmt=high&amp;_orig=browse&amp;_srch=doc-info(%23toc%235979%232008%23999759994%23693282%23FLA%23display%23Volume)&amp;_cdi=5979&amp;_sort=d&amp;_docanchor=&amp;_ct=45&amp;_acct=C000050221&amp;_version=1&amp;_urlVersion=0&amp;_userid=10&amp;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>