12 The following table indicates that the labor productivity per hour on the two commodities X and Y:
  In the Ricardian trade theory, the two countries have gains in trade after international trade. The possible P term of trade ( ) is _______ . 
(A)1
(B) 1/2
(C) 1/3
(D)3

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統計: A(1), B(1), C(3), D(8), E(0) #2996009