1[1]AAAS,American Association for the Advancement of science.Science for all Americans.New York:Oxford University Press,1990
2[2]Kimball, M. E. (1967-68) Understanding the nature of science: a comparison of scientists and science teachers. Journal of Research in Science Teaching, 5, 110-120
3[3]Abd-El-Khalick, F., Bell, R. L. and Lederman, N. G. (1998) The nature of science and instructional practice: making the unnatural natural.Science Education, 82, 417-437.
4[4](NRC) National Research Council (1996) National Science Education Standards (Washinton, DC: National Academic Press)
