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Greece is a developed country with high standards of living[citation needed] and high Human Development Index. Its economy mainly comprises the service sector (85.0%) and industry (12.0%), while agriculture makes up 3.0% of the national economic output. Important Greek industries include tourism (with 14.9 million international tourists in 2009, it is ranked as the 7th most visited country in the European Union and 16th in the world by the United Nations World Tourism Organization) and merchant shipping (at 16.2% of the world's total capacity, the Greek merchant marine is the largest in the world), while the country is also a considerable agricultural producer (including fisheries) within the union.

Greece holds what rank among most visited countries in the world?
Answer: 16th
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Differences in pain perception and tolerance thresholds are associated with, among other factors, ethnicity, genetics, and sex. People of Mediterranean origin report as painful some radiant heat intensities that northern Europeans describe as nonpainful. And Italian women tolerate less intense electric shock than Jewish or Native American women. Some individuals in all cultures have significantly higher than normal pain perception and tolerance thresholds. For instance, patients who experience painless heart attacks have higher pain thresholds for electric shock, muscle cramp and heat.

What do some individuals in all cultures have significantly higher than normal?
Answer: pain perception
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The territory of modern-day Mexico was home to numerous indigenous civilizations prior to the arrival of the Spanish conquistadores: The Olmecs, who flourished from between 1200 BCE to about 400 BCE in the coastal regions of the Gulf of Mexico; the Zapotecs and the Mixtecs, who held sway in the mountains of Oaxaca and the Isthmus of Tehuantepec; the Maya in the Yucatan (and into neighbouring areas of contemporary Central America); the Purépecha in present-day Michoacán and surrounding areas, and the Aztecs/Mexica, who, from their central capital at Tenochtitlan, dominated much of the centre and south of the country (and the non-Aztec inhabitants of those areas) when Hernán Cortés first landed at Veracruz.

What was Mexico home to prior to the arrival of the Spaniards?
Answer:
indigenous civilizations