【简答题】2014-06-section A.mp3: 1 A) College tuition has become a heavy burden for the students. B) College students are in general politically active nowadays. C)He took part in many protests when he was at c...
【单选题】听力原文: Many of us believe that a person's mind becomes less active as he grows older. But this is not true, according to Dr.Jarvik, professor of psychiatry at the University of California. She has stud...