Titlebook: ;

鸽子

Mohamed M. Ahmeded out by Foxall stress the need to adopt systematic theoretical treatment of learning history in behavior analysis, with the adoption of theoretical concepts related to, what in ordinary language would be called, abilities and propensities that can summarize what individuals typically do, or are ca

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射手座

和蔼

HEED

purpose is to present and analyze various measures of the effectiveness with which inputs are transformed into outputs. Early efforts in this direction were made by . [1951] and . [1951]. Koopmans defined a feasible input-output vector to be efficient if it is technologically impossible to increase

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