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<P >以下为一个<FONT face="Times New Roman">XML</FONT>文件，请画出其树形结构图：</P><P ><FONT face="Times New Roman"><?xml version="1.0" standalone="yes"?></FONT></P>
<P ><FONT face="Times New Roman"><class></FONT></P>
<P ><FONT face="Times New Roman"> <student></FONT></P>
<P ><FONT face="Times New Roman"> <No>001 </No></FONT></P>
<P ><FONT face="Times New Roman"> <name>zhang </name></FONT></P>
<P ><FONT face="Times New Roman"> <mark> </FONT></P>
<P ><FONT face="Times New Roman"><chinese> 80 </chinese></FONT></P>
<P ><FONT face="Times New Roman"><math> 90</math> </mark></FONT></P>
<P ><FONT face="Times New Roman"> </student></FONT></P>
<P ><FONT face="Times New Roman"> <student></FONT></P>
<P ><FONT face="Times New Roman"> <No>002 </No></FONT></P>
<P ><FONT face="Times New Roman"> <name>liu </name></FONT></P>
<P ><FONT face="Times New Roman"> <mark> </FONT></P>
<P ><FONT face="Times New Roman"><chinese> 90 </chinese></FONT></P>
<P ><FONT face="Times New Roman"><math> 75</math></FONT></P>
<P ><FONT face="Times New Roman"> </mark></FONT></P>
<P ><FONT face="Times New Roman"> </student></FONT></P>
<P ><FONT face="Times New Roman"> <student></FONT></P>
<P ><FONT face="Times New Roman"> <No>003 </No></FONT></P>
<P ><FONT face="Times New Roman"> <name>wang </name></FONT></P>
<P ><FONT face="Times New Roman"> <mark> </FONT></P>
<P ><FONT face="Times New Roman"><chinese> 59 </chinese></FONT></P>
<P ><FONT face="Times New Roman"><math> 85</math> </mark></FONT></P>
<P ><FONT face="Times New Roman"> </student></FONT></P>
<P ><FONT face="Times New Roman"> <student></FONT></P>
<P ><FONT face="Times New Roman"> <No>004 </No></FONT></P>
<P ><FONT face="Times New Roman"> <name>chen </name></FONT></P>
<P ><FONT face="Times New Roman"> <mark></FONT></P>
<P ><FONT face="Times New Roman"><chinese> 85 </chinese></FONT></P>
<P ><FONT face="Times New Roman"><math> 95</math></FONT></P>
<P ><FONT face="Times New Roman"></mark></FONT></P>
<P ><FONT face="Times New Roman"> </student></FONT></P>
<P ><FONT face="Times New Roman"> </class></FONT></P>
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