?? ch3 應(yīng)用題參考答案.mht
字號:
bsp; &nb=
sp; &nbs=
p; =20
</SPAN>V(S2);</SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US>Y:=3Dz+y;</SPAN><SPAN=20
lang=3DEN-US style=3D"FONT-FAMILY: =CB=CE=CC=E5"> </SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A2=DC</SPAN><SPAN =
lang=3DEN-US><SPAN=20
style=3D"mso-spacerun: =
yes"> &n=
bsp; &nb=
sp; &nbs=
p; =20
</SPAN>z</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5; mso-ascii-font-family: 'Times New =
Roman'; mso-hansi-font-family: 'Times New Roman'">=A3=BA</SPAN><SPAN=20
lang=3DEN-US>=3DZ+X</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5; mso-ascii-font-family: 'Times New =
Roman'; mso-hansi-font-family: 'Times New =
Roman'">=A3=BB=A2=E0</SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>End<SPAN=20
style=3D"mso-spacerun: =
yes"> &n=
bsp; &nb=
sp; =20
</SPAN><SPAN=20
style=3D"mso-spacerun: =
yes"> &n=
bsp; &nb=
sp;</SPAN>end</SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A2=D9 =A1=A2=A2=DA =A1=A2=A2=DD =
=BA=CD=A2=DE=20
=CA=C7=B2=BB=CF=E0=BD=BB=D3=EF=BE=E4=A3=AC=BF=C9=D2=D4=C8=CE=BA=CE=B4=CE=D0=
=F2=BD=BB=B4=ED=D6=B4=D0=D0=A3=AC=B6=F8=BD=E1=B9=FB=CA=C7=CE=A8=D2=BB=B5=C4=
=A1=A3=BD=D3=D7=C5=CE=DE=C2=DB=CF=B5=CD=B3=C8=E7=BA=CE=B5=F7=B6=C8=BD=F8=B3=
=CC=B2=A2=B7=A2=D6=B4=D0=D0=A3=AC=B5=B1=D6=B4=D0=D0=B5=BD=D3=EF=BE=E4=A2=DF=
=CA=B1=A3=AC=BF=C9=D2=D4=B5=C3=B5=BD<SPAN lang=3DEN-US>x =3D 10=20
, y =3D 4 </SPAN>=A1=A3=B0=B4<SPAN lang=3DEN-US>Bernstein =
</SPAN>=CC=F5=BC=FE=A3=AC=D3=EF=BE=E4=A2=DB =
=B5=C4=D6=B4=D0=D0=BD=E1=B9=FB=B2=BB=CA=DC=D3=EF=BE=E4=A2=DF =
=B5=C4=D3=B0=CF=EC=A3=AC=B9=CA=D3=EF=BE=E4=A2=DB=20
=D6=B4=D0=D0=BA=F3=B5=C3=B5=BD<SPAN lang=3DEN-US>z =3D 5 =
</SPAN>=A1=A3=D7=EE=BA=F3=A3=AC=D3=EF=BE=E4=A2=DC =BA=CD=A2=E0 =
=B2=A2=B7=A2=D6=B4=D0=D0=A3=AC=D5=E2=CA=B1=B5=C3=B5=BD=C1=CB=C1=BD=D6=D6=BD=
=E1=B9=FB=CE=AA=A3=BA<SPAN=20
lang=3DEN-US><BR></SPAN>=D3=EF=BE=E4=A2=DC =CF=C8=D6=B4=D0=D0=A3=BA<SPAN =
lang=3DEN-US>x =3D10 , y =3D9 , z=3D 150=20
<BR></SPAN>=D3=EF=BE=E4=A2=E0 =CF=C8=D6=B4=D0=D0=A3=BA<SPAN =
lang=3DEN-US>x =3D10 , y =3D19 , z=20
=3D15<BR></SPAN>=B4=CB=CD=E2=A3=AC=BB=B9=D3=D0=B5=DA=C8=FD=D6=D6=C7=E9=BF=
=F6=A3=AC=D3=EF=BE=E4=A2=DB =
=B1=BB=CD=C6=B3=D9=A3=AC=D6=B1=D6=C1=D3=EF=BE=E4=A2=E0 =
=BA=F3=D4=D9=D6=B4=D0=D0=A3=AC=D3=DA=CA=C7=D2=C0=B4=CE=D6=B4=D0=D0=D2=D4=CF=
=C2=C8=FD=B8=F6=D3=EF=BE=E4=A3=BA<SPAN lang=3DEN-US><BR>7=20
</SPAN>=A3=BA=B6=FE<SPAN lang=3DEN-US>z + X : <BR>z : =3D y + 1 ; <BR>y =
: </SPAN>=A3=BD<SPAN=20
lang=3DEN-US>Z</SPAN>=CA=AE<SPAN lang=3DEN-US>y ; =
<BR></SPAN>=D5=E2=CA=B1<SPAN lang=3DEN-US>z=20
</SPAN>=B5=C4=D6=B5=D6=BB=BF=C9=C4=DC=CA=C7<SPAN lang=3DEN-US>y =
</SPAN>=A3=AB<SPAN lang=3DEN-US>1=3D5 </SPAN>=A3=AC=B9=CA<SPAN=20
lang=3DEN-US>y =3DZ</SPAN>=A3=AB<SPAN lang=3DEN-US>Y=3D5 + =
4=3D9</SPAN>=A3=AC=B6=F8<SPAN lang=3DEN-US>x =3D=20
10 </SPAN>=A1=A3<SPAN =
lang=3DEN-US><BR></SPAN>=B5=DA=C8=FD=D6=D6=C7=E9=BF=F6=CE=AA=A3=BA<SPAN =
lang=3DEN-US>x =3D 10=20
</SPAN>=A3=AC<SPAN lang=3DEN-US>Y=3D9 , Z =3D 5 </SPAN>=A1=A3</SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">4 </SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D3=D0=D2=BB=D4=C4=C0=C0=CA=D2=A3=AC=B6=C1=D5=DF=BD=F8=C8=EB=
=CA=B1=B1=D8=D0=EB=CF=C8=D4=DA=D2=BB=D5=C5=B5=C7=BC=C7=B1=ED=C9=CF=B5=C7=BC=
=C7=A3=AC=B8=C3=B1=ED=CE=AA=C3=BF=D2=BB=D7=F9=CE=BB=C1=D0=B3=F6=D2=BB=B8=F6=
=B1=ED=C4=BF=A3=AC=B0=FC=C0=A8=D7=F9=BA=C5=A1=A2=D0=D5=C3=FB=A3=AC=B6=C1=D5=
=DF=C0=EB=BF=AA=CA=B1=D2=AA=D7=A2=CF=FA=B5=C7=BC=C7=D0=C5=CF=A2=A3=BB=BC=D9=
=C8=E7=D4=C4=C0=C0=CA=D2=B9=B2=D3=D0<SPAN=20
lang=3DEN-US>100 </SPAN>=B8=F6=D7=F9=CE=BB=A1=A3=CA=D4=D3=C3=A3=BA<SPAN =
lang=3DEN-US>l </SPAN>=A3=A9=D0=C5=BA=C5=C1=BF=BA=CD<SPAN lang=3DEN-US>P =
</SPAN>=A1=A2<SPAN lang=3DEN-US>V </SPAN>=B2=D9=D7=F7=A3=BB<SPAN =
lang=3DEN-US>2=20
</SPAN>=A3=A9=B9=DC=B3=CC=A3=AC=C0=B4=CA=B5=CF=D6=D3=C3=BB=A7=BD=F8=B3=CC=
=B5=C4=CD=AC=B2=BD=CB=E3=B7=A8=A1=A3</SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B4=F0=A3=BA<SPAN=20
lang=3DEN-US>1 </SPAN>=A3=A9=CA=B9=D3=C3=D0=C5=BA=C5=C1=BF=BA=CD<SPAN =
lang=3DEN-US>P </SPAN>=A1=A2<SPAN lang=3DEN-US>v=20
</SPAN>=B2=D9=D7=F7=A3=BA</SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">var name </SPAN><SPAN =
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BA<SPAN=20
lang=3DEN-US>array [ l =A1=AD100]of A ; <BR>A =3D record <BR>number =
</SPAN>=A3=BA<SPAN=20
lang=3DEN-US>integer ; <BR>name</SPAN>=A3=BA<SPAN lang=3DEN-US>string ; =
<BR>end <BR>for i=20
: =3D 1 to 100 do {A [ i ].number </SPAN>=A3=BA<SPAN =
lang=3DEN-US>A [ i ].name :null;} <o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">mutex , seatcount : semaphore ; =
<BR>i : integer=20
</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BB<SPAN =
lang=3DEN-US>mutex : =3D l ; seatcount :=20
=3D 100 ; <BR>cobegin <BR>{ <BR>process readeri ( var =
readename</SPAN>=A3=BA<SPAN=20
lang=3DEN-US>string ) </SPAN>=A3=A8<SPAN lang=3DEN-US>i=3D1 , 2 =A1=AD) =
<BR>{ <BR>P ( seatcount=20
) ; <BR>P </SPAN>=A3=A8<SPAN lang=3DEN-US>mutex ) ; <BR>for i : =3D 1 to =
100 do=20
i++<o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">if A [ i ].name</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BD<SPAN lang=3DEN-US>null then A =
[ i ].name</SPAN>=A3=BA<SPAN=20
lang=3DEN-US>readername</SPAN>=A3=BB<SPAN =
lang=3DEN-US><o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">reader get the seat =
number=3Di</SPAN><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BB<SPAN=20
lang=3DEN-US>/*A[I].number<o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">V ( mutex ) <BR></SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=BD=F8=C8=EB=D4=C4=C0=C0=CA=D2=A3=AC=D7=F9=CE=BB=BA=C5<SPAN=
lang=3DEN-US>i </SPAN>=A3=AC=D7=F9=CF=C2=B6=C1=CA=E9=A3=BB<SPAN=20
lang=3DEN-US><BR>P ( mutex ) ; <BR>A[i]name</SPAN>=A3=BA<SPAN =
lang=3DEN-US>null ; <BR>V=20
</SPAN>=A3=A8<SPAN lang=3DEN-US>mutex ) ; <o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">V(seatcount);<o:p></o:p></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=C0=EB=BF=AA=D4=C4=C0=C0=CA=D2=A3=BB<SPAN =
lang=3DEN-US><o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">}<o:p></o:p></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">}<o:p></o:p></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">coend</SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US =
style=3D"FONT-FAMILY: =CB=CE=CC=E5">2=20
</SPAN><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=A3=A9=CA=B9=D3=C3=B9=DC=B3=CC=B2=D9=D7=F7=A3=BA<SPAN =
lang=3DEN-US><BR>TYPE=20
readbook=3Dmonitor <BR>VAR R: condition ; <BR>I,seatcount =
</SPAN>=A3=BA<SPAN=20
lang=3DEN-US>integer;<BR>name</SPAN>=A3=BA<SPAN lang=3DEN-US>array [ =
l:100] of string ;=20
<BR>DEFINE rcadercome, readerleave ; <BR>USE check , wait , signal , =
release ;=20
<BR>Procedure readercome ( readername ) <BR>begin <BR>check ( IM ) ; =
<BR>if=20
seatcount</SPAN>=A1=DD<SPAN lang=3DEN-US>100 wait ( R,IM ) <BR>seatcount =
: =3D seatcount=20
+ 1 ; <BR>for i=3D1 to 100 do i++<BR>if name[i] =3D=3Dnull then =
name[i]:=3D readername;=20
<o:p></o:p></SPAN></SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US =
style=3D"FONT-FAMILY: =CB=CE=CC=E5">get=20
the seat number =3D i ; <BR>release ( IM ) ; <BR>end <BR>procedure =
readerleave (=20
readername ) <BR>begin <BR>check ( IM ) ; <BR>seatcount--; <BR>for i =3D =
1 to 1 00=20
do i++<o:p></o:p></SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US =
style=3D"FONT-FAMILY: =CB=CE=CC=E5">if=20
name</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=DB<SPAN =
lang=3DEN-US>i </SPAN>=A3=DD<SPAN=20
lang=3DEN-US>readername then name</SPAN>=A3=DB<SPAN =
lang=3DEN-US>i</SPAN>=A3=DD<SPAN=20
lang=3DEN-US>:null;<o:p></o:p></SPAN></SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">release ( IM ) ; <BR>end <BR>begin =
<BR><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>seatcount : =
=3D 1OO ;=20
name:</SPAN><SPAN style=3D"FONT-FAMILY: =CB=CE=CC=E5">=A3=BD<SPAN =
lang=3DEN-US>null ; <BR>end=20
<BR>cobegin <BR>{ <BR><SPAN style=3D"mso-spacerun: yes"> =20
</SPAN>process readeri ( i =3D 1 , 2 </SPAN>=A3=AE=A1=AD =A3=A9<SPAN =
lang=3DEN-US><BR><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>begin =
<BR><SPAN=20
style=3D"mso-spacerun: =
yes"> =20
</SPAN>readercome ( readername</SPAN>=A3=A9<SPAN lang=3DEN-US>; =
<BR><SPAN=20
style=3D"mso-spacerun: =
yes"> =20
</SPAN>read the book ; <BR><SPAN=20
style=3D"mso-spacerun: =
yes"> =20
</SPAN>readerleave ( readername</SPAN>=A3=A9<SPAN lang=3DEN-US>; =
<BR><SPAN=20
style=3D"mso-spacerun: =
yes"> =20
</SPAN>leave the readroom;<o:p></o:p></SPAN></SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US =
style=3D"FONT-FAMILY: =CB=CE=CC=E5">end=20
<BR>}<o:p></o:p></SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">coend.<o:p></o:p></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">5. </SPAN><SPAN=20
style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=D4=DA=D2=BB=B8=F6=BA=D0=D7=D3=C0=EF=A3=AC=BB=EC=D7=B0=C1=CB=
=CA=FD=C1=BF=CF=E0=B5=C8=B5=C4=BA=DA=B0=D7=CE=A7=C6=E5=D7=D3=A1=A4 =
=CF=D6=D4=DA=D3=C3=D7=D4=B6=AF=B7=D6=BC=F0=CF=B5=CD=B3=B0=D1=BA=DA=D7=D3=A1=
=A2=B0=D7=D7=D3=B7=D6=BF=AA=A3=AC=C9=E8=B7=D6=BC=F0=CF=B5=CD=B3=D3=D0=B6=FE=
=B8=F6=BD=F8=B3=CC<SPAN=20
lang=3DEN-US>P1 </SPAN>=BA=CD<SPAN lang=3DEN-US>P2 =
</SPAN>=A3=AC=C6=E4=D6=D0<SPAN lang=3DEN-US>P1=20
</SPAN>=BC=F0=B0=D7=D7=D3=A3=BB<SPAN lang=3DEN-US>P2=20
</SPAN>=BC=F0=BA=DA=D7=D3=A1=A3=B9=E6=B6=A8=C3=BF=B8=F6=BD=F8=B3=CC=C3=BF=
=B4=CE=BC=F0=D2=BB=D7=D3=A3=BB=B5=B1=D2=BB=B8=F6=BD=F8=B3=CC=D4=DA=BC=F0=CA=
=B1=A3=AC=B2=BB=D4=CA=D0=ED=C1=ED=D2=BB=B8=F6=BD=F8=B3=CC=C8=A5=BC=F0=A3=BB=
=B5=B1=D2=BB=B8=F6=BD=F8=B3=CC=BC=F0=C1=CB=D2=BB=D7=D3=CA=B1=A3=AC=B1=D8=D0=
=EB=C8=C3=C1=ED=D2=BB=B8=F6=BD=F8=B3=CC=C8=A5=BC=F0=A3=AE=CA=D4=D0=B4=B3=F6=
=C1=BD=BD=F8=B3=CC<SPAN=20
lang=3DEN-US>P1 </SPAN>=BA=CD<SPAN lang=3DEN-US>P2 =
</SPAN>=C4=DC=B2=A2=B7=A2=D5=FD=C8=B7=D6=B4=D0=D0=B5=C4=B3=CC=D0=F2=A1=A3=
</SPAN></P>
<P style=3D"LAYOUT-GRID-MODE: char"><SPAN style=3D"FONT-FAMILY: =
=CB=CE=CC=E5">=B4=F0<SPAN=20
lang=3DEN-US>1 =
</SPAN>=A3=BA=CA=B5=D6=CA=C9=CF=CA=C7=C1=BD=B8=F6=BD=F8=B3=CC=B5=C4=CD=AC=
=B2=BD=CE=CA=CC=E2=A3=AC=C9=E8=D0=C5=BA=C5=C1=BF<SPAN lang=3DEN-US>s1 =
</SPAN>=BA=CD<SPAN=20
lang=3DEN-US>s2 =
</SPAN>=B7=D6=B1=F0=B1=ED=CA=BE=BF=C9=BC=F0=B0=D7=D7=D3=BA=CD=BA=DA=D7=D3=
=A3=AC=B2=BB=CA=A7=D2=BB=B0=E3=D0=D4=A3=AC=C8=F4=C1=EE=CF=C8=BC=F0=B0=D7=D7=
=D3=A1=A3<SPAN lang=3DEN-US><BR>var S1 , S2 :=20
semaphore; <BR>S1 : =3D l; S2 </SPAN>=A3=BA<SPAN =
lang=3DEN-US>=3D0;<BR>cobegin <BR>{=20
<BR><SPAN style=3D"mso-spacerun: yes"> </SPAN>process =
P1=20
<BR><SPAN style=3D"mso-spacerun: yes"> =
</SPAN>begin=20
<BR><SPAN style=3D"mso-spacerun: yes"> =
</SPAN>repeat=20
<BR><SPAN style=3D"mso-spacerun: yes"> </SPAN>P( =
S1 ) ;=20
<BR><SPAN style=3D"mso-spacerun: yes"> =
</SPAN></SPAN>=BC=F0=B0=D7=D7=D3<SPAN=20
lang=3DEN-US><BR>V ( S2 ) ; <BR>until false ; <BR>end <BR>process P2 =
<BR>begin=20
<BR>repeat <BR>P ( S2 ) ; <BR></SPAN>=BC=F0=BA=DA=D7=D3<SPAN =
lang=3DEN-US><BR>V (S1 ) ; <BR>until=20
false ; <BR>end <BR>} <BR>coend . </SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">=B4=F0<SPAN lang=3DEN-US>2 : =
<BR>TYPE pickup-chess =3D MONITOR=20
<o:p></o:p></SPAN></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">VAR flag : boolean ; <BR>S-black , =
s-white : codition=20
;<o:p></o:p></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">DEFINE pickup-black , pickup-white=20
;<o:p></o:p></SPAN></P>
<P style=3D"MARGIN-BOTTOM: 12pt; LAYOUT-GRID-MODE: char"><SPAN =
lang=3DEN-US=20
style=3D"FONT-FAMILY: =CB=CE=CC=E5">USE wait,signal , check , release ; =
<BR>procedure=20
pickup-black ; <BR>begin <BR>check(IM ) ; <BR>if flag then =
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