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2 天前 · Titanic is a 1997 American epic romantic disaster film directed, written, produced, and co-edited by James Cameron.Incorporating both historical and fictionalized aspects, it is based on accounts of the sinking of RMS Titanic in 1912.Leonardo DiCaprio and Kate Winslet star as members of different social classes who fall in love during the ship's maiden voyage.
4 天前 · Joseph Vissarionovich Stalin (born Dzhugashvili; 18 December [O.S. 6 December] 1878 – 5 March 1953) was a Soviet politician and revolutionary who was the longest-serving leader of the Soviet Union from 1924 until his death in 1953. He held power as General Secretary of the Communist Party from 1922 to 1952, and Chairman of the Council of Ministers (head of government) from 1941 until his death.
1 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 ...
1 天前 · Name The name Vatican City was first used in the Lateran Treaty, signed on 11 February 1929, which established the modern city-state named after Vatican Hill, the geographic location of the state within the city of Rome. "Vatican" is derived from the name of an Etruscan settlement, Vatica or Vaticum, located in the general area the Romans called Ager Vaticanus, "Vatican territory".
1 天前 · Slovenia (/ s l oʊ ˈ v iː n i ə, s l ə-/ sloh-VEE-nee-ə; Slovene: Slovenija [slɔˈʋèːnija]), officially the Republic of Slovenia (Slovene: Republika Slovenija ), is a country in southern Central Europe. Slovenia is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short coastline within the Adriatic Sea to the ...
1 天前 · Portugal, officially the Portuguese Republic, is a country located on the Iberian Peninsula, in Southwestern Europe, and whose territory also includes the Macaronesian archipelagos of the Azores and Madeira.It features the westernmost point in continental Europe, its mainland west and south border with the North Atlantic Ocean and in the north and east, the Portugal-Spain border constitutes ...
1 天前 · In a DNA double helix, each type of nucleobase on one strand bonds with just one type of nucleobase on the other strand. This is called complementary base pairing.Purines form hydrogen bonds to pyrimidines, with adenine bonding only to thymine in two hydrogen bonds, and cytosine bonding only to guanine in three hydrogen bonds. . This arrangement of two nucleotides binding together across the ...
