求比值.n0Z:k2R.G+W4@1X;?/V7~7k
(1)0.02:0.8 ;V;s(p-_.z0s4N)G.n0Z:k2R.G+W4@1X;?/V7~7k
(2)0.5厘米:2米 ;|/}(d,[1~7n.n0Z:k2R.G+W4@1X;?/V7~7k
(3)1/2:5/6 -_5S9}-|.n0Z:k2R.G+W4@1X;?/V7~7k
(4)4:1/3 -r:o7?2q8|'A7z/^6V8a*m9}.n0Z:k2R.G+W4@1X;?/V7~7k