科普文章 2000字 不要超纲

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/29 01:48:32
x|ncIޫ6lCVVu2hwap ʀ Orf݅jTW_)"ZHJ$E--w~.Fëz_q,x`D"'NĿq~_;}Ÿs{xccCݕB~ƽ3?|Ū׿rn8W5Gˌ;G[*WpS'3#鸪^-›U[v:5gO}﻽yTmqcvS>|Zq?rᔛdjAdxnZYki +c<cyZ̧5i0*@ d*UQ0jRMq[*qT?|PFr\ILT} 4u"lם5{nYzkg_5pO~<߂ɨr)rjNT-쏥ޢ89;.Gr<FF6դ2bSW)({( JKU;LXL6sQcNQgB5*DŇNݝ_Lmpȍi"Kb@)i(nǁsZT.'n=ns7=Uupu9u^sŢ WNVɗ5 Tb_v^#0m ,"3~ʝut4YYV\~q[{sy*n8tq ?T,1eEIEZuݭAWhwHGh/WI!֋UT@M-g^?KxlE}\|Sաȭ9[=,WZƆs;aUTbT-aUУ3S2I[t޿F9AO61" S%8`,>1X| ,l[Y\"ץ긓ՇX/njV; D%LhK[wM ynzoj:q0Nv??ymIŢχi˫jз Ű_@oIcտVsIcK-*\]d^XEGvFduaOfhER'p.ގAv~o'U|z.br>T]b !!xÞ{yFHcGpZi = +8z`U $\K/p/ѭ8s`-ٟCW@uu !+˵ P -r۾`u}P⚿V8xnOg:vF\5qw0e 7UG/?a5G\WQN!*ܶ$zpYHvvl6ش<.VUNj=>kngaF3j/K X°] &٤5~bv.Hc&POp> hށ\ DkCEư! Jnj檖:wIxCz;n@V(ZzA_NMH:9{ƥTA%z6?)h--IIh,K}np v\8]-^7G舢G1M5ܥ;y ɀn8zP?&c~͹8'Ʒ r|ܧ}>qQ>(n@*||h'*QsS}8%lk.zw tNwQB fBbs>J-[ѪQ }w-ڵYY^k?r1U_-ٓv&ύyA-\Ǜ!c F8W) MlC8yfg @d8(LD%d y'8+ g NYU$`Ƨp?[s95 y6|4&;{5LsaQLB&W3NjԹ}jX*T rgcqui᭮'ӁLJBIlw <Ց 1ErwBs^v3.F'7؝ j`0ԓNtR& ΃QT@u7#7mc[0Y^[_ZsG&(҉ v`hR̃"!F[]-:@Vny((k>( ~J *6>q1'(*jP;9ϴPAYyr+&:qXUŏ3T:1MDZ39vtmxJ'{;rH\Z$+lNyys ڢv{ .ˤOV Ot(2l=x6֥a =d]Ydbd ؓ@XG=9&[+-rبvݢR** p0Xn`@_{ lma% ;)7Y-5 @fB/ζ}l!NI|n =~  xro ]0*aO|'uv o2*4LNZ6۸N=gJ7#vS=xeɽV瑐>) _Nٔuu(|:G(XgǓarYH~B1$x.0Vx8쉆 \2,yV&Z؟Ki'Di=soS:"yf mN{tu N0ѵ06ghӞ |]ji,rF[* Lgedf abҘd"7lPN}&OOζYmx7\ J3ń,X3`r: 2%S iY,eoyY-t]~jtrJ3Ut§lqi#j1`@zQ&TE|(SS b!O,D7U-߷Kx^wt4fIr&uӱ\6 fwY?6$&-Zg \RǤqTFoT#x=֡@Oz^fKdt|IR:mR`"2/i7%?|^+yEሉ# -8>[p$2&5$H?dcE} MKawZr=wM*˒ _/⦤mV;{&GÒqBc?Fn]2y.[2Bދ0Q-(ܒX_S[u9kEl]Ȝ*9yZG>YQ6!úExzA)R@Ȅ,3_A*qLb{ P65[9M*2c-؛~U9؇$mE%> 9W:hX =*#*w/eAr\ ֛0:elf|ƖZgIIIRcǠsfau)5 [f'$Z z9 T*W\K\5 \+1v/;rI-#!Yl_D&￑X:xMAE/p!=4WfPf|xicJl /dpꅤ"U,wIЭ‡'iHRngX'D^ʞs7%Sed؋EK+JfT!O19>擃e)V)_ypkMlzSnB9b`Nȑ>C+]|!cc /~ wd9s$H$" gsL1&{ )NP'䶟M>0dh%l(C?,+ lPN)Y0(ewc74aCPSc>2mḨ C>JB?&.rkAą !<7}<@.B5b=DgٯMTxbFNNLc#"^~&`dBLHEQδsnfD(P+)~YៜDt*`(toEe{„'|e ,sO*|pls*(Wй9ZՐUB,[[{ /NpTP 7J fNZ6ZmEiVqs.)^WTZTpN+L Aj'G;+\͇Η_3"&^ թީ;|y͍ߌ;yں{lQzQtJ,sII k7?c51%K+* 7wY2OIDBGvb΂y0F遷io. 㶦 '\<7@$`W O8-uVFPһ N;It*ս#ʰ"8YQ O,+ TwfB=EfT`Bl<{b.WlE(Ҳ2R18Yz8-_4g^*bbBH&b;c23%Kȳ~0DqB16Wd6eT`Zz|| IA鼟;$°JfX|+R?ޛ*L=A>ql}(X݋]8sVƱO99Ɓx.)j[zS3mgmKBl h$՞ ҩ HzNKFXws{1,٪Ҥz+wnc΢1<,nk("FX$i ϗ"8.N솳i鱍+ y5 !u?:𩢇K]lb5i{*df?SjDɾs# ex>ˉ`S|:KkSU?$u6 TX9 I{e-R>N FF+ lXۺr6oִ :ۋӞs^AZ&WIa>ͽqfp}=O`mWY*~g t"\Z)+2>XP j\reݮ,uqt[XJ}om1َh&HpNlK՞Y-MɎjy"~~_gotqAq-Vc^k-&Q@IqDw}T*uI"K,ԦSH֞m:4PO[zש3K)ʎHh?@^≫bT&Q(#+f|[ܤ=o6]'l’YXgK|4 FfʒsƂ۶5ANX#i5KkaLJ\%OƄ(tݭ-}\:lܟ=PZdoMdslchHh7/L[*S]U*,A=ecebv0hF̴Gm@0o@bb|P+qF,.c9vx3`2=S"n聶&Ev36gR;?\‘lk>J1ʽ;$OmnG y?HuwZ="j`50ڮs5操 lg:ͨ靛K~މː D"0sN'5C(|F1G[k> 5hN}J$ZGqSc{S 1n h䣾lڃӑ?pܴbZ*[3(DYfE-]x4ܢ9bD\ΰb&#GIYIDgRΤ8! 0OҨ qry9ˮ -i%ocɬҁK.=X 3Ԥ@06+$cͶB" qyj'>T21*@I?2 W_B;>U[;:k]fZg`Ҥ)_ߵ"|};8 yIB ޮ:8+[..gV6GCaRyQ4'j]G$nMɊur62uR*~?_ۻ2xrS0N/Y䗎S }7߾ }/}y (N:9}xef'#EM)E* V>MqZ3`D Hg9ebK܆8T(SB#MaVmk:-rQ{7u"VSؓb.WG( g3.9Vɴ;݋慉0*]b"0fX)#馽AF"c'! aׂCSd;frM;s:'J6f!0ÐoO?o߽IqNu=}wrs{>֠/Fjv(ً"8ui2 4Fxv!̿WW dѩG>XD@7QF͞c jIb ]_oy n 賬`X)\[J8H/BfD; YB;+j^hbc+vbT nzq?CԽr'Xø:SNȘ95%G[o9YCϠ)WpOy͆&>3I&pAqw;;ϰ@_?Wx7_3jZ3v}n/91##ʛAI[*$x-yR.a? ʱXKS$Cpcͪ\;JcɀS]DJ>^oz*-Fx2S1U+"uULsFBB`*-0Q)oc>8K''`yin}[T;iAʧ'8">UEJ ߕ;;ˋ?|Q}eǡ 6kN@"{~2{jd( vs>slZ?ɨL. r0iާRT{LCn{;qaerr꼳?0Ll ty/"Ketwj'o~t5nWĹ'D<{2oa5(XgD;JTAvqJ¹l/*LG23uG~ߖq4OEĝ!R/]Qqy>C@~ /8g@ ,f1E6SN0Yx"d8›]R' &CږJGUXQ6oEʟ2XnHIQ꒡l ~x ;/}IZd>Ōxe8?Ɣ_ogHJRfx31LZzؼ~[_$ͷ_}oo}o Ph8l\l)aVr.;3r&V1ͯ)(Hc] 4K1 <5{kjŶcN>L d13P!0mŐEj l"Jbv aTu6~ߧp4yI؄j #5R pvƘ|&T2Ԗy)o-#DCKUsGR[RMPNݾ;^Q9,3r# W2b-s]jHY-~ DGY QAP`9TX'ȿ9R>c񋏐},aJUyYKn+KQTxp ƱY~4pg-4m5ǐA.l؆ ,H."[S{9]4 9(rs>C+.޴6'rK\8e, 1}Ig qԁlʙ@j0i ~gʈ!5Me06df%괩L_μȌbY_IUm TiSkBM'I)ښ q:7pFBa|щc_Co~|eS_0\RSWc<34S>T#8d}~,+T.>;<.M~@E^,&cV5 mt?:?dІmRa1?`⌯iUcWi>R^-E8HmTϋ - i { q{ԃķt4~ML~/{DbHS5gY@v}ƥfOJ' Da(K_q3zwiiFE~Xr%&Ǻ9FU=L#f֕S~GX2cGC`rR^5PINY)&4![a|tZ!^qmN'- -qONmI׏_k;?}']ڳKgRB< myKx9IV9$[L/EX/~*/Q0טrexVNM(Q]~gZU#a )6}:ӌ{r]eiJZ`*/ً^&6a/dE;x%1q?Nux| Dmǃr+7o!lKPN "?sw-xDQfL `*HKM13ndOS˵eGgc Q3/Jb!g-`8|1N&'CEl7h۫F85p.73b8Lȴ!ٚ@KI`&,e3)erïm?&1\*nQë́rm3,V;Q52%D׌Ėd#1 yhRng̈!Wf17+[, 0~Dgf ( RSS|V˫C& PLVv*wMMU|3]"UV؇~ %\B>AIl][xXW>"IUwI5s~( Oρ'8