单项选择题A.Stop by the Career Services Center and ask for help.B.Look for an internship.C.Change his major to accounting.D.Call the Career Services Center to make an appointment.
单项选择题A.To maintain a high heart rate for the longest duration.B.To reach and maintain your target heart rate for the entire exercise.C.To burn calories as efficiently as possible.D.To maximize your heart rate and get rid of extra fat.