新闻敏感应该具备的三种能力是什么？ A.
发现 B.
判断 C.
预测 D.
评论

单项选择题If a rational utility maximizer is a net demander of a good， and if an increase in its pricecauses him to buy more of it， then it must be an inferior gooD.。

单项选择题If a consumer is a buyer of some goods and a seller of others， then a change in prices will generate an extra income effect in the Slutsky equation due to the revaluation of the consumer；s endowment.。