2Underwood, R. (1989). Teaching Listening[M].London: Longman. Larry, V. (2004).
3Listening to Learn or learning to listen[J].Annual Review of Applied Linguistics,24:3-25.
4Miller, G.A. (1956). The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information [J]. Psychological Review, 63:81-97.