【单选题】Considering a PPF with health care services on the vertical axis and other goods and services on the horizontal axis, the increasing production of health care services in the United States as a result...
A.
a movement upward along the PPF.沿 PPF 向上运动。
B.
an outward shift of the PPF from the vertical axis. PPF 从垂直轴向外移动。
C.
an outward shift of the PPF from the horizontal axis. PPF 从横轴向外移动。
【简答题】如果我们的政府不对人口老龄化问题予以足够重视,在不久的将来很多老年人是要吃苦头的。 If our government didn’t ____ ____ ____ ____the problem of population aging, the future senior citizens would certainly suffer a lot.
【判断题】Aging population is one of the most serious challenges that China is faced with. According to experts, the aging population in China will approach to 500 million within 40 years, which accounts for on...