src=3D"./ch2-5.files/image039.gif" =
v:shapes=3D"_x0000_i1051"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1051"
  DrawAspect=3D"Content" ObjectID=3D"_1207488430">
 </o:OLEObject>
</xml><![endif]-->=3D<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1052=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image036.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image040.gif" =
v:shapes=3D"_x0000_i1052"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1052"
  DrawAspect=3D"Content" ObjectID=3D"_1207488431">
 </o:OLEObject>
</xml><![endif]-->-=AA=AD<SUB><!--[if gte vml 1]><v:shape =
id=3D_x0000_i1053=20
style=3D"WIDTH: 81pt; HEIGHT: 35.25pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image041.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D108 height=3D47
src=3D"./ch2-5.files/image042.gif" =
v:shapes=3D"_x0000_i1053"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1053"
  DrawAspect=3D"Content" ObjectID=3D"_1207488432">
 </o:OLEObject>
</xml><![endif]-->(<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1054=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image043.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image044.gif" =
v:shapes=3D"_x0000_i1054"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1054"
  DrawAspect=3D"Content" ObjectID=3D"_1207488433">
 </o:OLEObject>
</xml><![endif]-->-<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1055=20
style=3D"WIDTH: 21pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image045.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D28 height=3D24
src=3D"./ch2-5.files/image046.gif" =
v:shapes=3D"_x0000_i1055"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1055"
  DrawAspect=3D"Content" ObjectID=3D"_1207488434">
 </o:OLEObject>
</xml><![endif]-->) (n=3D1,2,=A1=AD) =
(2)=AA=A7=AA=A7<o:p></o:p></SPAN></P>
<P class=3DMsoNormal=20
style=3D"TEXT-INDENT: 36pt; TEXT-ALIGN: left; mso-layout-grid-align: =
none; mso-char-indent-count: 3.0; mso-char-indent-size: 12.0pt"=20
align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =CB=CE=CC=E5; mso-bidi-font-size: =
10.0pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; =
mso-font-kerning: 0pt; mso-ansi-language: =
ZH-CN">=BA=DC=C3=F7=CF=D4=A3=AC=CB=FC=D2=B2=BF=C9=D3=C9=C5=A3=B6=D9=B7=A8=
=D3=C3=B2=EE=C9=CC<SUB><!--[if gte vml 1]><v:shape=20
id=3D_x0000_i1056 style=3D"WIDTH: 81pt; HEIGHT: 35.25pt" o:ole=3D"" type =
=3D=20
"#_x0000_t75" coordsize =3D "21600,21600"> <v:imagedata o:title=3D"" src =
=3D=20
"./ch2-5.files/image047.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D108 height=3D47
src=3D"./ch2-5.files/image048.gif" =
v:shapes=3D"_x0000_i1056"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1056"
  DrawAspect=3D"Content" ObjectID=3D"_1207488435">
 </o:OLEObject>
</xml><![endif]-->=BD=FC=CB=C6=B4=FA=CC=E6=CE=A2=C9=CCf=A1=E4(<SUB><!--[i=
f gte vml 1]><v:shape id=3D_x0000_i1057=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image036.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image049.gif" =
v:shapes=3D"_x0000_i1057"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1057"
  DrawAspect=3D"Content" ObjectID=3D"_1207488436">
 </o:OLEObject>
</xml><![endif]-->)=AA=A7=B6=F8 =
=B5=C3=A1=A3=AA=A5=C8=F4=B0=D1(2)=D6=D0=B5=C4<SUB><!--[if gte vml =
1]><v:shape=20
id=3D_x0000_i1095 style=3D"WIDTH: 21pt; HEIGHT: 18pt" o:ole=3D"" type =
=3D "#_x0000_t75"=20
coordsize =3D "21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image034.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D28 height=3D24
src=3D"./ch2-5.files/image050.gif" =
v:shapes=3D"_x0000_i1095"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1095"
  DrawAspect=3D"Content" ObjectID=3D"_1207488437">
 </o:OLEObject>
</xml><![endif]-->=BB=BB=CE=AA<SUB><!--[if gte vml 1]><v:shape =
id=3D_x0000_i1096=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image005.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image051.gif" =
v:shapes=3D"_x0000_i1096"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1096"
  DrawAspect=3D"Content" ObjectID=3D"_1207488438">
 </o:OLEObject>
</xml><![endif]-->,=AA=A7=D4=F2=B5=C3=B5=FC=B4=FA=B9=AB=CA=BD<SUB><!--[if=
 gte vml 1]><v:shape id=3D_x0000_i1097=20
style=3D"WIDTH: 21pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image038.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D28 height=3D24
src=3D"./ch2-5.files/image052.gif" =
v:shapes=3D"_x0000_i1097"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1097"
  DrawAspect=3D"Content" ObjectID=3D"_1207488439">
 </o:OLEObject>
</xml><![endif]-->=3D<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1098=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image036.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image053.gif" =
v:shapes=3D"_x0000_i1098"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1098"
  DrawAspect=3D"Content" ObjectID=3D"_1207488440">
 </o:OLEObject>
</xml><![endif]-->-=AA=AD<SUB><!--[if gte vml 1]><v:shape =
id=3D_x0000_i1099=20
style=3D"WIDTH: 74.25pt; HEIGHT: 35.25pt" o:ole=3D"" type =3D =
"#_x0000_t75" coordsize=20
=3D "21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image054.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D99 height=3D47
src=3D"./ch2-5.files/image055.gif" =
v:shapes=3D"_x0000_i1099"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1099"
  DrawAspect=3D"Content" ObjectID=3D"_1207488441">
 </o:OLEObject>
</xml><![endif]-->(<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1100=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image043.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image056.gif" =
v:shapes=3D"_x0000_i1100"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1100"
  DrawAspect=3D"Content" ObjectID=3D"_1207488442">
 </o:OLEObject>
</xml><![endif]-->-<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1101=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image057.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image058.gif" =
v:shapes=3D"_x0000_i1101"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1101"
  DrawAspect=3D"Content" ObjectID=3D"_1207488443">
 </o:OLEObject>
</xml><![endif]-->)=AA=A7=AA=A7 (n=3D1,2,=A1=AD) =
(3)=AA=A7<o:p></o:p></SPAN></P>
<P class=3DMsoNormal=20
style=3D"TEXT-INDENT: 36pt; TEXT-ALIGN: left; mso-layout-grid-align: =
none; mso-char-indent-count: 3.0; mso-char-indent-size: 12.0pt"=20
align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =CB=CE=CC=E5; mso-bidi-font-size: =
10.0pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; =
mso-font-kerning: 0pt; mso-ansi-language: =
ZH-CN">=AA=A7=CF=D4=C8=BB=A3=AC=CB=FC=D2=B2=BF=C9=D3=C9=20
=C5=A3=B6=D9=B7=A8=D3=C3=B2=EE=C9=CC=AA=A7<SUB><!--[if gte vml =
1]><v:shape id=3D_x0000_i1102=20
style=3D"WIDTH: 74.25pt; HEIGHT: 35.25pt" o:ole=3D"" type =3D =
"#_x0000_t75" coordsize=20
=3D "21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image059.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D99 height=3D47
src=3D"./ch2-5.files/image060.gif" =
v:shapes=3D"_x0000_i1102"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1102"
  DrawAspect=3D"Content" ObjectID=3D"_1207488444">
 </o:OLEObject>
</xml><![endif]-->=AA=A7=BD=FC=CB=C6=B4=FA=CC=E6=CE=A2=C9=CC=AA=A7f=A1=E4=
(<SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1103=20
style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"> <v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image036.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image061.gif" =
v:shapes=3D"_x0000_i1103"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1103"
  DrawAspect=3D"Content" ObjectID=3D"_1207488445">
 </o:OLEObject>
</xml><![endif]-->) =
=B6=F8=B5=C3=A1=A3=AA=A5=D2=D4=C9=CF=C1=BD=D6=D6=B5=FC=B4=FA=B7=BD=B7=A8=B6=
=BC=B3=C6=CE=AA=B8=EE=CF=DF=B7=A8(=BB=F2=CF=D2=BD=D8=B7=A8)=A1=A3(2)=B3=C6=
=CE=AA=CB=AB=B5=E3=B8=EE=CF=DF=B7=A8=A1=A3=D2=B2=B3=C6=CE=AA=D3=D0=BC=C7 =

=D2=E4=B8=EE=CF=DF=B7=A8=A1=A3(3)=B3=C6=CE=AA=B5=A5=B5=E3=B8=EE=CF=DF=B7=A8=
=A1=A3=CB=FC=C3=C7=B6=BC=D0=E8=D2=AAx*=C1=DA=BD=FC=B5=C4=C1=BD=B8=F6=B3=F5=
=CA=BC=BD=FC=CB=C6=D6=B5<SUB><!--[if gte vml 1]><v:shape=20
id=3D_x0000_i1104 style=3D"WIDTH: 14.25pt; HEIGHT: 18pt" o:ole=3D"" type =
=3D=20
"#_x0000_t75" coordsize =3D "21600,21600"> <v:imagedata o:title=3D"" src =
=3D=20
"./ch2-5.files/image005.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D19 height=3D24
src=3D"./ch2-5.files/image062.gif" =
v:shapes=3D"_x0000_i1104"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1104"
  DrawAspect=3D"Content" ObjectID=3D"_1207488446">
 </o:OLEObject>
</xml><![endif]-->, <SUB><!--[if gte vml 1]><v:shape id=3D_x0000_i1105=20
style=3D"WIDTH: 12pt; HEIGHT: 17.25pt" o:ole=3D"" type =3D "#_x0000_t75" =
coordsize =3D=20
"21600,21600"><v:imagedata o:title=3D"" src =3D=20
"./ch2-5.files/image007.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D16 height=3D23
src=3D"./ch2-5.files/image063.gif" =
v:shapes=3D"_x0000_i1105"><![endif]></SUB><!--[if gte mso 9]><xml>
 <o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" =
ShapeID=3D"_x0000_i1105"
  DrawAspect=3D"Content" ObjectID=3D"_1207488447">
 </o:OLEObject>
</xml><![endif]--><SPAN style=3D"mso-spacerun: =
yes">&nbsp;</SPAN>=B2=C5=C4=DC=C6=F4=B6=AF=A1=A3=AA=A5=20
<o:p></o:p></SPAN></P>
<P class=3DMsoNormal=20
style=3D"MARGIN-LEFT: 30pt; TEXT-INDENT: -30pt; TEXT-ALIGN: left; =
mso-layout-grid-align: none; mso-list: l1 level1 lfo2; tab-stops: list =
30.0pt"=20
align=3Dleft><![if !supportLists]><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =CB=CE=CC=E5; mso-bidi-font-size: =
10.0pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; =
mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">=C0=FD1<SPAN=20
style=3D"FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
</SPAN></SPAN><![endif]><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: =CB=CE=CC=E5; mso-bidi-font-size: =
10.0pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; =
mso-font-kerning: 0pt; mso-ansi-language: =
ZH-CN">=D3=C3=CB=AB=B5=E3=B8=EE=CF=DF=B7=A8=C7=F3=B7=BD=B3=CC=AA=A7x<SUB>=
<!--[if gte vml 1]><v:shape=20
id=3D_x0000_i1106 style=3D"WIDTH: 6.75pt; HEIGHT: 15pt" o:ole=3D"" type =
=3D=20
"#_x0000_t75" coordsize =3D "21600,21600"> <v:imagedata o:title=3D"" src =
=3D=20
"./ch2-5.files/image064.wmz"></v:imagedata></v:shape><![endif]--><![if =
!vml]><img width=3D9 height=3D20
src=3D"./ch2-5.files/image065.gif" =