Lastyear，somegroupsofstudentsintheircommunitymadeasurve...
問題詳情：Lastyear，somegroupsofstudentsintheircommunitymadeasurveyabout“Howdopeoplespendtheirfreetime?”Thefollowingdiagramsshowsomeresultsofit．Diagram（1）：HoursforpeopleofdifferentageswhosurftheInternetinaw...