9Flavell, J. H. Metacognitive Aspect of Problem Solving [A]. In L. B. Resnick(Ed.), The Nature of Intelligence [C]. Hillsdale, NJ : Eribaum, 1976,231 -- 236.
10O' Malley,J. M. & Chamot,A. U. Learning Strategies in Second Language Acquisition[M]. Cambridge: Cambridge University Press, 1990.
