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mui c s& ABng* FPu khng c nNi" ho!c nat#i su.Vat ho!cmagnesium su.Vate c s& ABng*^*3**3 iQi hu h-nJmm 1s jj2 sng 1(ng 72* FPu khng nNi" giQi h

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Trang 4AH; 3 giBi hn cho c,c ch2t c* hi !% /u cu t%i I)n !t &J th tng hD cho b tng FGTH7Jem hfnh* 7 cho 0 t#O c/a c8c khu 0c th$i tiPt 0 ch gi(i 5 c hQng Awn t#ong 0i>c s&

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j***+,tFghi:n n8t khng khO .m m8t bMng .K c .oc P% hu mn cs& ABng t#ong b tngc biPt . cha Ot h-n s ti:n ti a uy nh 0t ua mm 1s jj2 sng 1(ng 72 giQi h %h9n t#m 1r2 t#n s ti:n t#ong ct .i>u th c %hU% c tng .n Pnr 7 1L2 17jj J L2 1T J 2" t#ong N L t\ .> c8t t#ong b tng nh m,t %h9n t#m t'ng st'ng h%" T (ng 7 giQi h .4% b(ng cho m]i c/a c8c thnh %h9n*2C33^

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3jjJmm 1s j2J3j7jJmm 1s 7jj2jJ7jFGTHJb tng ct .i>u mn 0Qi g#aAings g9n ti thi5u cho%h9n t#m 0t ua 3jj mm 1_ j2 0 7j mm 1Fo*7jj2 i khi cNkhN khn 0Qi kh( nng hot%hB gia 5 cung c=% c8c kho(n ti:n %hu mn AQiem Ut" sS cN c8c thu,c tOnh cN .in uan Ot nh=t bMngnhng b tng c thc hi>n 0Qi c8c thnh %h9n t-ng t" 0Qingo . ct .i>u mn ti .i>u tham kh(o c .a ch?nt6 m,t ngun cN m,t b(n ghi hi>u su=t ch=% nh4n c t#ongy Ang b tng t-ng t*FGTHT'ng h% 3J+D m %h) h% 0Qi c8c yu c9u %hn .o

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Trang 6uy nh tu th 3 ho!c ^ c s& ABng" t'ng h% nnc cung c=% E Ot nh=t hai kOch thQc #ing bi>t*11.C,c ch2t c* hi77*7 Fgou su=t thqa 8ng t#ong b tng cho t-ng ng.ot . c8c A 8n nhq h-n*FGTHJIi 0Qi ct .i>u th t#ong b tng tiP% c 0Qi th$i tiPt" c8cb(n 0Qi c8c 0)ng th$i tiPt t#ong hfnh* 7 nhMm %hBc 0B ch

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Ot h-n so 0Qi ch nh* T#ong c( hai t#$ng h%" c8c nh nghYa c/a th$i tiPtmc , nghim t#?ng t#ong (ng 3 sS chi %hi* FPu cN nghi ng$ t#ong 0i>c .a ch?n giahai khu 0c" ch?n khu 0c th$i tiPt nghim t#?ng h-n*77" t'ng h% th 5 s& ABng t#ong b tng sS cb Qt" tiP% c mE #,ng cho b9u khng khO m Qt" ho!c

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ki5m t#a cN th5 h] t# t#ong 0i>c a #a 8nh gi87*7*7[\ng dCn 1/LJ+,t s 04t .i>u c biPt Pn .%h(n ng 0Qi ki:m t#ong i mng* Chng bao gm c8chfnh thc sau y c/a si.ica o%a." cha.ceAony" t#iAymite" 0c#istoba.ite; t#ung gian aciA th/y tinh ni .&a 1si.ica giu2

chng hn Ai>n 0 s .ng c/a c8c04t .i>u bMng c8ch ki5m t#a thc 8nh gi8ti:m nng %h(n ng ki:m* +,t s c8c ti .i>u ny .m cho m,tt'ng Ae.ete#ious.y %h(n ng khi cN m!t 0Qi s .ng nhOt nh=t . 7"j ho!c th4m chO Ot h-n*7*7*,hng php th 1 L]/T5ong%h-ng %h8% ki5m t#a ny" t'n bEi i5m nMm E bn %h(i c/a AKng #Wn c/a hfnh* Lh-ng %h8% th& C l th$ng c9n c em Ut ti:m.c 9u %h(n ng*

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