《尚书》是中国古代历史文献和部分追述古代事迹作品的汇编，包括《虞书》、《夏书》、《商书》和《周书》。()

It seems that the countries with more favorable demographics ______.A．lack adequate financial tools and social infrastructureB．provide opportunities for the world to recover growthC．have fiscal headroom to boost demand in the short runD．ensure that global growth rates return to previous level 点击查看答案

The author urges countries with aging populations______.A．to modify their spending and social policiesB．to increase their fertility rates by a large marginC．to persuade productive members to work longerD．to raise retirement ages to keep economy growing 点击查看答案