（）即为赫克歇尔－俄林模型(Heckscher–Ohlin model，即H-O模型)。

The earliest statement of the principle of comparative advantage is associated with A: David Hume B: David Ricardo C: Adam Smith D: Bertil Ohlin

The earliest statement of the principle of comparative advantage is associated with() A: David Hume. B: David Ricardo. C: Adam Smith. D: Eli Heckscher. E: Bertil Ohlin.

提出社会学习理论、差异接触理论和中和技巧理论的学者各自是____________、 ____________ 和___________。() A: Lombroso、 Ferri、Garofalo B: Bandura; Sutherland; Matza/Sykes C: Ohlin、Burgess 、Akers D: Eysenck、 Freud、Yochelson and Samenow