0.4%?

回答: r/2(R+r)=about 4%o.Please note the tangent line.jinjing2011-08-13 14:27:31

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Yes.Only estimat,we don't know the time,it has relation with the -jinjing- 给 jinjing 发送悄悄话 (0 bytes) () 08/15/2011 postreply 16:33:51

It has relation with the rotation of the Earth. -jinjing- 给 jinjing 发送悄悄话 (0 bytes) () 08/15/2011 postreply 16:50:46

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