【判断题】Assume that corn and cloth are each produced using both land and labor in a country. Corn is relatively land-intensive. If the country experiences an increase in its endowment of labor, product prices...
【单选题】A: Good morning, John. It's nice to meet you. B:Nice to meet you too, Susan. A: It's such a nice sunny day, but we have to spend it indoors. B: Yeah, what a pity! The two people are ___.
【简答题】Jack and Li are good friends. Li: Why, Jack, are you all right? You don't 1 . Jack: I'm feeling 2 . I've got a terrible headache. Li: It might be a bad cold. Have you taken any medicine? Jack: I took ...