Hehasmillionsofstudentsfromallovertheworld.Theylistent...
问题详情： Hehasmillionsofstudentsfromallovertheworld.Theylistentohisclassesonline.They 16 seehisfaceonthescreen.SalmanKhan,42,fromtheUS,isthefounder（创始人）ofthelearningwebsiteKhanAcademy.Unli...