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3 天前 · Bitcoin (abbreviation: BTC; sign: ) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that guarantees the ...
1 天前 · according to International Monetary Fund estimates [n 1] [1] Countries by nominal GDP in 2019 [n 2] > $20 trillion. $10–20 trillion. $5–10 trillion. $1–5 trillion. $750 billion – $1 trillion. $500–750 billion. $250–500 billion.
4 天前 · All leaders at the 2021 G20 Summit in Rome, Italy. Bring together systemically important industrialized and developing economies to discuss key issues in the global economy. [1] The G20 or Group of 20 is an intergovernmental forum comprising 19 sovereign countries, the European Union (EU), and the African Union (AU).
1 天前 · List of ongoing armed conflicts. Map of ongoing armed conflicts (number of combat-related deaths in current or previous year): Major wars (10,000 or more) Wars (1,000–9,999) Minor conflicts (100–999) Skirmishes and clashes (1–99) The following is a list of ongoing armed conflicts that are taking place around the world.
2 天前 · Myocardial infarction Other names Acute myocardial infarction (AMI), heart attack A myocardial infarction occurs when an atherosclerotic plaque slowly builds up in the inner lining of a coronary artery and then suddenly ruptures, causing catastrophic thrombus formation, totally occluding the artery and preventing blood flow downstream to the heart muscle.
2 天前 · The Heckler & Koch MP5 ( German: Maschinenpistole 5) is a submachine gun developed in the 1960s by German firearms manufacturer Heckler & Koch. It uses a similar modular design to the Heckler & Koch G3, and has over 100 variants and clones, [14] including selective fire, semi-automatic, suppressed, compact, and even marksman variants. [15] .
2 天前 · World War II or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two alliances: the Allies and the Axis powers. Nearly all of the world's countries, including all of the great powers, participated in the conflict, and many invested all available economic, industrial, and scientific capabilities in pursuit of total war, blurring the distinction between ...
