Inthepastdecadethepopularityofrockclimbinghasgreatlyin...
问题详情： Inthepastdecadethepopularityofrockclimbinghasgreatlyincreased,andsohasthenumberofinjuries.Ithasbeenestimatedthatrockclimbingisnowenjoyedbymorethan9millionpeopleintheUSeachyear.Studyfindingsr...