求助
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">1．双向线有何作用？</FONT></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">2．如何让AutoCAD 2002显示等分点和测量点？</FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman"></FONT>3<FONT face="Times New Roman">．进行区域填充时应该注意什么？</FONT></P>
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