Ifyouareinacrowd,afirstandmostimportantthingistomakey...
问题详情： Ifyouareinacrowd,afirstandmostimportantthingistomakeyourselffamiliarwithyoursurroundings(周围的事物)andmentallynoticealternateexits.Nomatterwhereyouare,makesureyoualwaysknowhowtogetout.Mak...