- 问题详情:You'rerushingtoworkandamanaheadofyoufallsdownonthesidewalk.Doyoustoptohelp?Inastudyofby-standers,itwasfoundthatsomepeoplekeeponwalking."Thereisatendencytodecidethatnoactionisneeded,"saysapsychologist,"Inordertotakeaction,youhavetoworkagai...
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