Welcome back,I miss you...at first I forgot 2pai,...
Thx, my earth radius is too long ,if it is 6370km,the answer is
所有跟帖:
• 6370/6400*85=84 -jinjing- ♀ (0 bytes) () 09/15/2011 postreply 10:17:40
• 6370/6400*85=84 -jinjing- ♀ (0 bytes) () 09/15/2011 postreply 10:17:40