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4 天前 · PPP largely removes the exchange rate problem but not others; it does not reflect the value of economic output in international trade, and it also requires more estimation than GDP per capita. On the whole, PPP per capita figures are more narrowly spread than nominal GDP per capita figures.
1 天前 · About 68% of values drawn from a normal distribution are within one standard deviation σ from the mean; about 95% of the values lie within two standard deviations; and about 99.7% are within three standard deviations. [6] This fact is known as the 68–95–99.7 (empirical) rule, or the 3-sigma rule.
1 天前 · Methamphetamine[note 1] (contracted from N-methylamphetamine) is a potent central nervous system (CNS) stimulant that is mainly used as a recreational or performance-enhancing drug and less commonly as a second-line treatment for attention deficit hyperactivity disorder and obesity.[23] It has also been researched as a potential treatment for ...
2 天前 · The following list shows the countries whose buildings are featured on the main list of world's tallest buildings (first list featured above), in order from most amount of buildings on the list to least amount of buildings on the list. Rank. Country. Number of skyscrapers on list.
1 天前 · It is situated at the northeastern end of the line of the three main pyramids at Giza. Initially standing at 146.6 metres (481 feet), the Great Pyramid was the world's tallest human-made structure for more than 3,800 years.
17 小時前 · The wolf (Canis lupus; [ b ]pl.: wolves), also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, including the dog and dingo, though gray wolves, as popularly understood, only comprise naturally-occurring wild subspecies.
1 天前 · Fentanyl is a highly potent synthetic piperidine opioid primarily used as an analgesic. It is 20 to 40 times more potent than heroin and 100 times more potent than morphine; [ 9 ] its primary clinical utility is in pain management for cancer patients and those recovering from painful surgeries. [ 10 ][ 11 ] Fentanyl is also used as a sedative ...
