科研选题的一般原则有哪些?

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/08 11:03:24
x|in+ɵV 4п6t/ato8OEID5DIrFdB`$2^. "3DzUṷσ?N'UT ̩qΪo18P]x| jx?㒮=ʑLg}LލJG<2]gW2>~ ?I݀?~^T*\Uv29\pϒ$g-u/NenfЧ#d{+OO8~&0~`ϺLC'J}:{vu+$PDA+?L&_=-Y뫌53Ug=w 'a{Ly䒦Kݭ|i̔ 0u{"#r4/!-RTusd:Y-깲da䑄?+C1`':mr 6?Ð1r51\חx+_u zbk@gjnuS,Zę`,JfQ(ngՠH$9x _,m++U(]/ T'<ȼΕƒm3?K.wU-xZj=b'"{4ZwV 3o-p5TU^>/{FسG*IxQ'% #tADZx_W H/qxƕXccրR D 3{C]mh#R1r|bxuu>f M| ٸT/ށ*[,su 7(aw* VMNL3DeIjCUW-ӱn}WKoLBv9Ēa/i\O [NX 7?A;la]Mo]*Z¹ rj0 .{c e;cZpL#KYºK<v9 S֙ I!Dl1B"jK_(iې~5p/ゔuZMVNϳVO=G`:=(]]:#*L]˨bMaO*h~/*P]| R]qI,9.uhjlb}R8PӰiZ4r2$9',$X!.[z~Om=@ꀛ/8h򼁁1l,(ehxlfyT':dt  1d}SP%Y I-=(H-E:L3 |D>ʯ~K1_7A;bỨ'ӆ\#֑;Wccs_xe&;Z_Sγ*h^o`Bgv?.܂38 h W Mt)e !/"t 9=dT_uðN8-s}W'BBG;ec78wǷG-(^ANP&abU*I7 jRɞ̯٥; 53$LpemhJj~PMD^גuJaAj >P'hcnP;V>I<U<,nů1.)~-Ar\dj݆MCZtToߠ@Sa:[l 'I {aNgC/J&Vɓ@5rA*'>1/CzeV~0`2Y28z "ߦAJ7yոEis.(Q8<` WVgTM+ᳰiiO&Fɪy&ň;0ƍv n< Fd:#Y}z4|d$Q69)kCCb{r[z5(B{D*Ɛ[,id"PF ̽{}5׵;r;7\`P{]#`:Cv5}5ʮ׭{8 8'-l*uj0gmp2f3% EW4I2_ #e5//Wc0g5 hd_0&W#Ven3SrevP컢@!>2bV !"JjNIZΤ9:łB#1^HN{0+Yv!q'K8~X$>=՟lK(FdkmŸ DkDSTM HND^x@zItyA'Z\M] 0Wŕqð#oin_b:0UDT l8yqJodFeHa1fY0(#\0Gh=brQٱNmKZ,Ta(J&[`]r99GfN 6^alڳD "!'Ρ7FEBqcu A#.oPvH0 .Xy@=2anjdPRalєyUݣt)IGQۆj.v}<iӪêu7T5tA0{Y45a za O*; {dSS/ q`s^`88t_󎴌=8Y4pBHu`cLNe-Q4dOo}TM3ApU'}0F@VHA5"0fir J_ȐJrR ;(WǗ%_DxI>}JǰXYJd/+{"ȉW~3HyfQ{UKef"SX V⡿'Td\4?ut&8,>C5%=hdY4x+eQ;T$ 8*f]cKMg퉟~%yI,7|LXc:0*+T.d_~rlp9 =>@e2a|vOtS`_UƬ 7ZHI(qc=䭐}mElona'|]3~ k@9efsr)4 >[{T\(@6S".AITM)־ᾰN-'!_qV(q~,r(kn 0O ׻[R"zGb`*:Ww#܁,7Dq{'2)skR:'Kfcr>`|H7iT~R>1Em};S5v å.lsI[h zIFǢrsQ3S& q]B~M{c6)O%H%5slS6S6 ;qK$Lup tG&VNu)G6nOtr ;u/+\[Lf?Kӫ׷u)inZ3'^)ꌸ™z,o0-R{o2R:D$ԃ磶Є;@(\[vHZkA6\ǓQz%Bu3t6iks,eS[ʟD94I}]x;nOLO?KYjQ}j`M]L3sT !1!ĚRv0) Kgw촛¨ sQfm_]^M2EҳvfdV$T>SX >3c8 U1%H@lBA< 1HJ gD ¨*jSƒ3DULU#Or׆>6[vIy1Y'c_\n>2Gcv=5$~7c6[fs.~2N˱g/#ҍ'n"p{ ӓ.Z|@z.vl%!iC@KMDlG~cTu L˯8m2@ś( ɜ 4\.c3ܥ=gdӵ} )46* ֭,fTa~іj1۝N&XP+ 7 .WlQ4ynᄜif'oNv7  ѵ j\fwSu.Op4lk%z *U^>"ٽUAJ,{O !'%$g>"sڪFޡM}@#,'.TB9yiWMgZEY>ů^.)`+/rL[]}K` e&~rcjtAv/*L-'LnfAmu^{\5MFV 5%$AZyQTD-E}"ڧQ øZT#RBӧ&W)1RÓQkU>J!0,YXOq6VERH&G83iB`. 738ӈmur͕=S\E]6'byF ?6VK,Gf%s^b$ݏ{]ImIfip?ʚhh5) \r.HH::/kzme}ʺzdJź0j23JI"=<|z6CWM&b Y9ScT͙b^\L?^p |MGUn1()$~/LޫBcbGͦ>*9e0.^cԤcqP%u#5>T.٢WlE5v"bj^zM,.e(GBkN`QbWe=I r8{QPV(\38Z6gw4D~}LkfG |еI[?ϣ;!n*uSFz]- TZ,[x;} 8^DeeQ_h?"Pb T3MOB!xJlFgN:%^"g3WڒXqKm&N(].5")FX<QP}ԣ :@_07 ڏBc pEW)`:t,Gm}$h/~ [7`u֭T,ܖgwmna.*s֥|g𗻪rfED,Ga? iauݺ uOnX]aM.ZWxp} YCcќ9(ӽ+=BCaUg˒mv }SqT-:$~|:iKVt1vξaX:6%(Wd(3j]~$z|1B4 *ۤZθI;y5˕yD67t}hsN}NF-eG׽ +&dÕn6"l*'6e~vqVu{&‹c*60wHӋtdY8ovalYɀu vZ!ieV:,7^f{? nH/tSIbN["\NUcIEAp,Wpx1޻'/?E0%*`L}VMS%#7H\U *CUN璭XnDpCK6l`73I͉tMpĩ(mӎCAytXC,#MjrncN}P[Q6z4 WO|#5GΑMa2/:261ѥ]߷f`mWkbˑ1 }rYaI25gO.ၹaX]*m&W)`veSXV/Y9LЃ.kɶ8!=OW̋p."lz FLHhTorMV$H+ߔ HKԔeH+5׼UDfō20{Ѱބ'tA-'|4LW.#l^ܙ[43v{稻&b2􊃷]zߊsbzbiKY/J4չ˓p_}a<ȼc^kuS{1f;9iދ&M5`~$ӄÑEa)eܾ]_-c.[O𸽒Rx}%}rr2ǗrnAVtL-}!,_&;ľU[9 eMEHj =,. w`v(2"]l4 H{"EP8@'~,)M[c6\ԕ}KΟ'19mͭ[nK^*$cml*S#Xc'}U/#Omt "ÌQ Pπ"'o}V>ZR=v&x4ju=/ܟni&0]"݄