单项选择题 下列哪一实验证实了科里奥利力的存在？ A. 傅科摆实验 B. 厄缶实验 C. 多普勒效应实验 D. 比萨斜塔实验

多项选择题 If a government has a macroeconomic policy objective of expanding the overall level of economic activity, which TWO of the following measures would be consistent with such an objective? A. Increasing public expenditure    B. Increasing interest rates C. Increasing the exchange rate D. Decreasing taxation

单项选择题 经济中生产的所有商品都必须以有效率的方式在各人之间加以分配,这样的要求称为 A. 生产的效率; B. 分配的效率; C. 产品组合的效率; D. 交换的效率。