%PDF-1.7 % 11 0 obj << /Type /Page /Parent 1 0 R /LastModified (=9h \\0t;=) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 12 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /Annots [ 6 0 R ] /PZ 1 >> endobj 12 0 obj <> stream xZ#OKI51 uPRSycݍj|{%5)]TbWFD>Qmj,kA3F8 !cin1I>(~=1>'YVEy endstream endobj 13 0 obj << /Type /Page /Parent 1 0 R /LastModified (zsLDkD`rXzJ6) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 14 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /Annots [ 8 0 R ] /PZ 1 >> endobj 14 0 obj <> stream .K3z4$̡Ao0aW4>iS2 \: r-bKx]^T2a -w1c")i|5Ww%GۤC*zVʩ޻nIKՔ"4mpR]cߋ;7mByiŷg@Ǘo 5YrB(Blr( 6ϫg d?tC{.: MN<nxHܖ=#U} v_TAmOȞC BJ Ly>|g HS84HNsArBn;NG<'4$ueUs伞JN6Y-".}$x8˯Q#y oxcgp@U4&݁qF̗KsDB endstream endobj 15 0 obj << /Type /Page /Parent 1 0 R /LastModified (rj 2% ި4K) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 16 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 16 0 obj <> stream xߙywZ` HFM=vb1tgN'd򽛼߯wm&He=`ۑ+$Bh",ӒWq33^Vj#6p7EBB= 9W0Ǥ 'Z{se*'\&oz SkRWd)O2 ۡ5Qf8%Nȫ˚ʄIs\@w*=ݦ&P&b+C .2@h  fKt~XBPn>~_ +8B-YQVx,rCPU.J`Nc1J#&Kyoh҈F*i~Xj=oITK4 |]ϙ ᴀTQOUT~E)ej8]S3EQ|>]IJ",zS$S|׭aĖ $r7oX/;fOVϤn([P@Q^Ez,:|- :Sk&3UIY"$±.b@#kV_Gig!т*CS YyQ! =C] 2{3}b2tY=^:AOLyO> 0gff[wA8C}r 2NJтKĴv:U )i`U{LwYcsy-+֡Eųd'9r$ɘdzG[RtNl!# ̵ٻ̯#Bf{ gKN`^|l.dsW߬ jXߡj2 ~ ,K:|ńCzUWkkkAY0kոUQ*JRo!/*Rpm1Agu6R>Nz(Qk=2& 8QrCSpoa膼g endstream endobj 17 0 obj << /Type /Page /Parent 1 0 R /LastModified (_'tRFH) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 18 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 18 0 obj <> stream Sg qK/UhMhubvbw[y5v}~L_*L583YTR`͊%"FZ_* ol^.VwhȚ; >T9; \8v?߉ x j.m߾C zU̬FILw3UKgSÔ }%UQO4ߓֻoO/rsYrnou0\}j!.`*QKþɬI??[vCU#s`7`>1>8_ILV\ԩUeSXf(>94'`L W!ԝT< cиDe,Jjv{ :r_4jjfcsGT"bT^;`$IZ6K8(YGU!L;o6:˲=@!( &]_#\ˋR/4W,˛(h[edɳHU$=/cZS8Pݴ]fB~nޭٙ"Yz:{2xx Ovuy'H^Ju,kVd15@)=?ĭ ᥙ)M圬oO~lD?ap>_ATn3̯bs 9Hcok"x*P,BwnqF"73E ^tn@x+?gPh:BߊE(opW˰o O8ty1ʺZ$1,!|\hh:˹` :1<5g ]{W{8L%0C.5r>OvWgOȾ:!aU%~:(s]r`[6і葦_sUeGW0-S>֨l-mdF)f(f4f8ρM;!Ԉ8>E65B:#zrAujn%ĄUaW? :' Mw!*ĘqA_8K2t/j-Z^ƔSGXJf#@@z+d3wDLK+r3|piR yDI%/:kĤ{u.AW8 endstream endobj 19 0 obj << /Type /Page /Parent 1 0 R /LastModified (|:0[?-C`) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 20 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 20 0 obj <> stream o^ceMLtDY '**fcqZ rʞKRWKV 毼3|hPf&?ih [(x~9lUE$3w#Gwܖf6\~@J19d| Mz&lޛM ] 52Y;p%p+pٹcGw!{wЉqwVYv`S/ӿ,lB+y {7O}%UjRkbk3p]W1a#(f`C M-33`0O* Q߽H0 V6 ;'~ {SY%A ~>XR3W/j ķg]^PTD;1m`.A*r";\ч6SdJGPGH`XxB m/|ǔк;Rb+O_bu9OxTH_`½LHn\""@3Dyle6] 4E?b endstream endobj 21 0 obj << /Type /Page /Parent 1 0 R /LastModified ('G/oq^) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 22 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 22 0 obj <> stream Ɂ(}:O:# f\BNêPe`dCtȩF8gQ Czod_碖+M fs$2g~蠋:5f;UU֐aB؉UަWS93z Ӿ]:HK\6Mq)u5%vxNCG?BB؆{U Չaw* #IyäukYБVht feɠ~pmMy;5/84@# $) Gif1^FzeM))>CR:TiK1m49"xT9ki6@e;鶠au'hJC)嬈` JtbQK ¿Qt> ?bvG=ADQd4ɩ`;0)Pq,ur^m"jG'bȐLB&YQiW"'Q좶ˢDrAFbrDQ},ޙG=΀6nKd7-8*8to0\օYK9H#cQ[BAJ(GPkӍw+BqXA1F"lh{ =K,|o\\:A;l `%GVAA]=6ϕ n/DxK- !yjV\#:W`/sIɰNXKue=oRp |&zf4mU6Dܤ=`2:TQ<_hR4Ne@Z6*E%Sf`KDFuH"M&J5 X)&*]/ endstream endobj 23 0 obj << /Type /Page /Parent 1 0 R /LastModified (0YX[uO_M_3yr) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 24 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 24 0 obj <> stream 6O SET}7Y)H} $m[UK2?G2bx.֋v QthfvbZQ\= :8W-jL?[oMxy9J?-{sXʿ N/ъ, ri ACbl v1+❃Th*YT-ܟ,!hmkB.xqؒkUN!]'hWt':6W L'Zb1,ǥlvX#߉;^JnjƤ/r~Ǡg o:ˎWxCn$3kն\w LҚZCEH) OSD^vB<.iPqi'{7ANR]|)lݗLasoBT6EďU!L H ~SAz}iIB mi*ԫDykԼ_cyT{4~'Q5V>K)=]"z/ىe꟬dORn'uOŹ-`;b*b%^-NnYRF"٧G-O4T =PڦؚΙb>|SWylKСn2 T58=z*_JqrH|F!b6˙ZnQCUK~CltU$9[ "KfF7lq1_IsΟ*NXjϸvϏ;z I~-RnсOI"l?Bٖi6Ⱦ.7cjpG N ՂIvaZڿzR\_qƈYbW~LiU)Peg endstream endobj 25 0 obj << /Type /Page /Parent 1 0 R /LastModified (i_ NB[oT;) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 26 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 26 0 obj <> stream n! EHC t=u?DܣpM}$DZ@Q0k׹FPvIFf~z] G@y( %]=:Qtv>:1:p@9wOf~|a]͙/o5_+x[H :9t:9IRGqRkv,Sf(UіȃJ'=Gd:(\9ȁ*v傒n%1 1$-]>"nh ~tB,<bc:D `7n3HL&b۱ ̀틚8Rl6jP!_06sw73a>ʴO_&hUeT6#J[ Zc8MM1f*waņ1ÙQV7R^O䤐 :խMEY&!h&RV;i˼p'sU-DykYaBֱڐ"(܇ _bzO<3-GT|OZ~6g(N.,ީ4>וNJL| [ȵM;Hrv%{h<({Pv~s\~IhbRvݝVwlJ䙇fJ)TGq=vU$&uJᾱn kTUV/T.ʳNh 3X6Ј.ctNG9'XkdWN+=J\x,rQ.)OA endstream endobj 27 0 obj << /Type /Page /Parent 1 0 R /LastModified (gɔ+7w+M) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 28 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 28 0 obj <> stream Ɛ1;{8SƉ69D$Vᇡ9w ],]mA)#$_ I(Ë%l&zgвCV@i=֚T+,'<^,Y%b‡V =;iMmѿAIMeluNwՏ2o&H{.yE2#OSvw~sŚ( y kwsG 02ޡ*W* Kpy!Έr[Fh?HЋLexʍnj>IWx4FKHȾ mGmX ׶|m/fZ^pv. b!&IuBʴ3[@sܝbg?5*)'c^’GKC9qs6Y IU1q?OaIcÑUUO|y s \yy5\[sgVm%9 YK=T[),tc>viغ_YrxQ(ϗKAz Inu]nM@e/X.8mk` v,ĽI݄\t@WئǥʏU{)~K5'=e$rse3#eRxXDB*y*?!Ōh^#b ySྡk/IDBȶi32D8F%^Z'(Ɯi endstream endobj 29 0 obj << /Type /Page /Parent 1 0 R /LastModified (m:D.=>V !1B) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 30 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 30 0 obj <> stream  tM>StXahṣx$^tux~FA%*ޛZ"9'͍mD4s+b"[Zv|cHŨh)+ >R? 2 SpZ_by߷46LNwc:o ] N>ʾ%.%tqxt z6u@jwpOʪAIx&-6v.R#Kki3@DWI&f>\Q&. /643 d/ZkL-H|q5R:Dt&uk[XΪ.Z8N<1;`xn-mW 8ÅQ.ṀlԵI]ZEN57eVBnv/&B?Nh-+vaX GdpGy9Qt"7nqBT-(KQՉf^vy{bS(0]'шj$He> /PZ 1 >> endobj 32 0 obj <> stream 40Ef L申|0)*+W?9ruű"dxES ' y V4 _?R&p3'PgcZ738h-_fcm B 'v@׏Zmig¸b@"zsJ007N3/!#b#YMonA[\IZAE3p@q", +96-n p- (nop `r'rYi,%PhG bE=W: G?lY7\@,&M-c`6wbGkѫ࿦ o ZS[Gaё/`NלQ*X@ Rd0`s 1> @qG(f?< h]ׄ y=u{?q˙$3%)*MKRNbddC baNfMU0Ƞ}PA6وaP:WJGَ|*g3[eRc"ж:"wK̘e!Ć2:FPS"#ޢ7'GK?eERG>K@;k~`U]$\Xe,$ k`7`#WCf/92n+ՂY7 n8Xv.:.7X} U5c'񥐅[)yp3 ;c`v8U^}P> /PZ 1 >> endobj 34 0 obj <> stream cul _[vo5e4>_@;6_"yUNUX"pFHFYvЭGSyY}M߬%$fgйcb#j tvrPa\ӣ΃gmoã=܏ 皇l,< iIq!z(en'̚"|"{[Mn>"KDDi=g"45(KA-dH+sObbm$Sb} HK+rYT[Xu aC Yzƅg v:7"K>RZ qB`rJ5𞿌"ƨ[s hVת i Ts>?cC q{+{~P>OѤR_stA2O|>aBr v@7KXC;NAܮ) :W&:LQNX\>?>@Y$%X̿\vѧnDx,2/Y&0$]F)|`rw"Kh.=,g?UqdLgB> +'h.^ajʈ䷄QPQ"q =cnfc68FgJv"\Nͳ n._-8IG,l:S^իfN̨.4x3TS VD"*0>;OR|LEݗF+Fn5xg=.5GuTG҅C/Z3? ;qi5)'74>4{c.~Ӽf=PYdF endstream endobj 35 0 obj << /Type /Page /Parent 1 0 R /LastModified (ͱ_e\rEV߅.f) /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 36 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> endobj 36 0 obj <> stream `ni=߾zĉ,ѱ{O-+;N=Nޙ9u\M)ȉL 3a%]%w$QSO@m8|s2a#”N#I͹mAXB}[O(&"&[}3VjejE[~}~FH:j7ajUˌkPQNBA]v#dY^WIQ/@cpS˭iN)@S 趷6}fVy^sDg蒭a,UO*o;!Ni$l1:|lSdr&#'~^,qc(67.)c\WbX],n/b۶ioMv9K1lƹֺ1 VxV${ m\+|@Eϯ$xIPfd2gؼq6 ]MޝֈOm4DWFZ׫e[ ") /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 38 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /Annots [ 9 0 R 10 0 R ] /PZ 1 >> endobj 38 0 obj <> stream |c'"5IKh&CybW-E+U v+"kP[X< iY@9?4L~t4dJvdXQLBa#08mu*\6OeGo`\p3XE"s,2k΢F/.2ub6wLДgp[)`")nNz`[ w {TռPw!= 쬁pIJeePeBWudfFf}Od`_E*.Ez@4װ5&, k=|W>6e{w\'E[]DCn la۾lY dZBִ2.PRH*^v4*W endstream endobj 1 0 obj << /Type /Pages /Kids [ 11 0 R 13 0 R 15 0 R 17 0 R 19 0 R 21 0 R 23 0 R 25 0 R 27 0 R 29 0 R 31 0 R 33 0 R 35 0 R 37 0 R ] /Count 14 >> endobj 3 0 obj <> endobj 4 0 obj <> endobj 39 0 obj <> /FontDescriptor 40 0 R /DW 1000 /W [ 1 [ 278 278 355 556 556 889 667 191 333 333 389 584 278 333 278 278 ] 17 26 556 27 28 278 29 31 584 32 [ 556 1015 667 667 722 722 ] 38 [ 667 611 778 722 278 500 667 556 833 722 778 667 778 722 667 611 722 667 944 667 667 ] 59 59 611 60 62 278 63 [ 469 500 333 556 556 500 556 556 278 556 556 222 222 500 222 833 ] 79 82 556 83 [ 333 500 278 556 500 722 ] 89 91 500 92 [ 334 260 334 584 ] 100 102 333 107 107 428 109 [ 222 222 333 333 ] 127 129 584 130 [ 422 561 561 713 823 561 561 549 561 600 549 418 584 800 800 506 506 ] 147 150 584 151 151 549 152 156 584 157 [ 549 561 561 740 740 667 222 372 1022 ] 171 [ 667 1073 823 816 ] 175 183 600 185 188 713 250 [ 278 555 832 933 667 ] ] >> endobj 40 0 obj <> endobj 5 0 obj <> endobj 41 0 obj <> /FontDescriptor 42 0 R /DW 1000 /W [ 1 [ 278 278 355 556 556 889 667 191 333 333 389 584 278 333 278 278 ] 17 26 556 27 28 278 29 31 584 32 [ 556 1015 667 667 722 722 ] 38 [ 667 611 778 722 278 500 667 556 833 722 778 667 778 722 667 611 722 667 944 667 667 ] 59 59 611 60 62 278 63 [ 469 500 333 556 556 500 556 556 278 556 556 222 222 500 222 833 ] 79 82 556 83 [ 333 500 278 556 500 722 ] 89 91 500 92 [ 334 260 334 584 ] 100 102 333 107 107 428 109 [ 222 222 333 333 ] 127 129 584 130 [ 422 561 561 713 823 561 561 549 561 600 549 418 584 800 800 506 506 ] 147 150 584 151 151 549 152 156 584 157 [ 549 561 561 740 740 667 222 372 1022 ] 171 [ 667 1073 823 816 ] 175 183 600 185 188 713 250 [ 278 555 832 933 667 ] ] >> endobj 42 0 obj <> endobj 7 0 obj << /Type /XObject /Subtype /Form /FormType 1 /Filter /FlateDecode /BBox [0.000000 0.000000 595.276000 85.039370] /Matrix [1 0 0 1 0 0] /Resources << /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] /Font << /F3 5 0 R /F2 4 0 R >> >> /Length 200 >> stream nMQ{n_2F˵MG֩> /XObject << /XT7 7 0 R >> >> endobj 6 0 obj <> /H /I>> endobj 8 0 obj <> /H /I>> endobj 9 0 obj <> /H /I>> endobj 10 0 obj <E.V,) /F 4 /Border [0 0 0] /A <> /H /I>> endobj 43 0 obj << /Filter /Standard /V 1 /Length 40 /R 2 /O (uɩܵ壆5 [wdZ) /U (%%63z^6tC&%MPi) /P 2147421956 /EncryptMetadata true >> endobj 44 0 obj << /Title (B<`u1Ƞi}}&fi\rq2ƬmUnJ%b& e&~'%O) /Producer (B<S{}{&fkYW?-At3BNdm ]A&έB"1iybs'Ǿ~qwܯk) /CreationDate (b5q+4͐hH~\r^~iI) /ModDate (b5q+4͐hH~\r^~iI) /Trapped /False >> endobj 45 0 obj << /Type /Metadata /Subtype /XML /Length 4305 >> stream application/pdf 2024-2030年中国装饰装修行业市场需求分析及投资方向研究报告 2024-07-21T00:43:53+08:00 2024-07-21T00:43:53+08:00 2024-07-21T00:43:53+08:00 TCPDF 6.2.26 (http://www.tcpdf.org) uuid:be5382fe-dde0-9fb6-b111-b6698aa6d3af uuid:be5382fe-dde0-9fb6-b111-b6698aa6d3af http://ns.adobe.com/pdf/1.3/ pdf Adobe PDF Schema http://ns.adobe.com/xap/1.0/mm/ xmpMM XMP Media Management Schema internal UUID based identifier for specific incarnation of a document InstanceID URI http://www.aiim.org/pdfa/ns/id/ pdfaid PDF/A ID Schema internal Part of PDF/A standard part Integer internal Amendment of PDF/A standard amd Text internal Conformance level of PDF/A standard conformance Text endstream endobj 46 0 obj << /Type /Catalog /Version /1.7 /Pages 1 0 R /Names << >> /ViewerPreferences << /Direction /L2R >> /PageLayout /SinglePage /PageMode /UseNone /OpenAction [11 0 R /FitH null] /Metadata 45 0 R >> endobj xref 0 47 0000000000 65535 f 0000020247 00000 n 0000023515 00000 n 0000020399 00000 n 0000020505 00000 n 0000021760 00000 n 0000023650 00000 n 0000023037 00000 n 0000023864 00000 n 0000024118 00000 n 0000024374 00000 n 0000000015 00000 n 0000000486 00000 n 0000001031 00000 n 0000001501 00000 n 0000002746 00000 n 0000003198 00000 n 0000005365 00000 n 0000005817 00000 n 0000007184 00000 n 0000007636 00000 n 0000008507 00000 n 0000008959 00000 n 0000009887 00000 n 0000010339 00000 n 0000011318 00000 n 0000011770 00000 n 0000012691 00000 n 0000013143 00000 n 0000013977 00000 n 0000014429 00000 n 0000015087 00000 n 0000015541 00000 n 0000016477 00000 n 0000016929 00000 n 0000017812 00000 n 0000018265 00000 n 0000019339 00000 n 0000019816 00000 n 0000020646 00000 n 0000021508 00000 n 0000021906 00000 n 0000022773 00000 n 0000024593 00000 n 0000024766 00000 n 0000025045 00000 n 0000029433 00000 n trailer << /Size 47 /Root 46 0 R /Info 44 0 R /Encrypt 43 0 R /ID [ ] >> startxref 29643 %%EOF