【简答题】B. Use the correct form of the words in the box to complete each sentence. Each word can only be used once. “beckon acceptable universal frown typical version ” He to the waittress to bring...
【单选题】Vintland and Moonited Republic produce wine and cheese. The opportunity cost for the production of a bottle of wine in Vintland is 2 pounds of cheese, and in the Moonited Republic is 2.5 pounds of che...