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某人坚持早晨在一条弃用的旧公路上步行锻炼身体,同时数数训练头脑,他先从某地向前走...
某人坚持早晨在一条弃用的旧公路上步行锻炼身体,同时数数训练头脑,他先从某地向前走2步后退1步,再向前走4步后退2步,…,再向前走2n步后退n步,…当他走完第2008步后就一直往出发地走.此人从出发地到回到原地一共走了( )步.
A.3924
B.3925
C.3926
D.3927
考点分析:
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