指南针的发展有哪些?

来源:学生作业帮助网 编辑:作业帮 时间:2024/08/09 03:01:29
xWYrݐ@Et/Dc@`Q`f 1DRn+}.骎"ltOL>~$i*[KnTUU _|%nroS3M]N`iU9HZZh=U\ /IV/ec U煬8cfeJ֤ҔrA^ܔAJWp钻TNl*{%dY扰ݔ뮯lBFo5 ] ]yjZbRcbUT1Gɤ¯ ^gEۙtu$v9پ3d7aAɵtHba:q +bߗ]6#zמ*|m {K̸58 T}iB\xyi/pT""sb)) _xwx+w!"A0Q%vGg)\r0)W Da@eKǒ-lĄ_԰c 3 rd#<Ԫ-вBB$'28b4I ;_=G^HoÞ;Ҡ\EUs9+䏳xS@{M/X.ĮX\T"tJbG`,1#N7q !>k-K*a:AnGshiiC Ѿ"pw~.e>k ={RDzLsUS@}7)řMz>ʝc q ͪ'$Nx6|'`ѷylEf*ߨq3Ԝtl)HhйH1<ύEOlp'vpLI{똂ɻj (dNfYJÜ#v ̼0_7TnH) Xb wqULC1F<"WRkKf_\2w_2;B"Ba0]Lى|wS9_ Yn- vN;dI8 d*G;CDyfj\H95om]6d Ldm"4̃g W~nsDC !*EՎى['=)0ae\jW-R4hɧqrM?)ߊ{ qtA5: q!;9Li}9RIxsվ J98;9QiK^aklܓ]R썤7UOv4G")S~j߳F첪*݄wq*8gg]yeDO2W7MŻ\>2ջa.R6Mk1k3Ɂ*_͗3(nP8:`+b#  D슸}1q~}oOAQk0h;{xFBw' s=zxXyT\{`NbknغO'0+sQ=Q`A;5"4= W9)z療AfՐBdc;5u0 ɹ1xA8^zI 䥹ac-o_Mn~)8OCQNash,ƾnJuj+I0B=aڭ3\\*{u_0g̺?>E#~O/3QA