為何美國不是世界上最偉大的國家？

Angels don't just sing at Christmastime. For most Americans, they're a year-round presence. A new Associated Press-GfK poll shows that 77 percent of adults believe these ethereal beings are real. Belief is primarily tied to religion, with 88 percent of Christians, 95 percent of evangelical Christians and 94 percent of those who attend weekly religious services of any sort saying they believe in angels.

Note that due to differences in reporting, these numbers may not be comparable across countries. The WHO recommendation is that all children who show signs of life should be recorded as live births. In many countries this standard is not followed, artificially lowering their infant mortality rates relative to countries which follow those standards.

This article is a list of countries by military expenditure in a given year. Military expenditure figures are presented in United States dollars based on either constant or current exchange rates. These results can vary greatly from one year to another based on fluctuations in the exchange rates of each country's currency.

"自由之土"监禁率世界第一 美国怎么做到的？