You'rerushingtoworkandamanaheadofyoufallsdownonthesidew...
问题详情：You'rerushingtoworkandamanaheadofyoufallsdownonthesidewalk.Doyoustoptohelp?Inastudyofby-standers,itwasfoundthatsomepeoplekeeponwalking."Thereisatendencytodecidethatnoactionisneeded,"saysaps...