阿摩線上測驗
14. Nontariff trade barriers have increased in popularity in part because they ________ .
(A) generate profits for foreign firms
(B) can be concealed from the WTO
(C) are easy for governments to enforce
(D) reduce smuggling along borders
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統計： A(2), B(17), C(5), D(6), E(0) #1094147
統計： A(2), B(17), C(5), D(6), E(0) #1094147
