琪琪电影网金真善剧情介绍:38.Samuelson, P.A.International Factor-price Equalization Once again.The Economic Journal, 1949, 234(59): 181-197.39.Scarth, R.and Tang, J.Modification of Oil Using Conventional and Transgenic Approaches.Crop science, 2006, 46(3): 1225-1236.40.Sor...