玻利維亞

The 60 largest sovereign countries in the world by land area.

Every sovereign country across all six inhabited continents.

All countries of the South American continent.

无国名提示的视觉与经济测验：通过国旗、国徽、货币、地标、首都、轮廓和反猜输入识别横跨六大洲的24个国家。