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Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ( natural numbers ), ( integers ), ( rational numbers ), ( real numbers ), and ...
Uses. Reusable writing surface on which text or drawings are made. A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
The United States became the world's leading industrial power at the turn of the 20th century, due to an outburst of entrepreneurship and industrialization and the arrival of millions of immigrant workers and farmers. A national railroad network was completed and large-scale mines and factories were established.
The Union of Soviet Socialist Republics [r] ( USSR) [s], commonly known as the Soviet Union [t], was a transcontinental country that spanned much of Eurasia from 1922 to 1991. It was the largest country in the world by area, extending across eleven time zones and sharing land borders with twelve countries.
Mexico, [a] [b] officially the United Mexican States, [c] is a country in the southern portion of North America. It covers 1,972,550 km 2 (761,610 sq mi), [11] making it the world's 13th-largest country by area; with a population of almost 130 million, it is the 10th-most-populous country and the most populous Spanish-speaking country. [12]
Beyond the Blackboard is a Hallmark Hall of Fame made-for-television drama film starring Emily VanCamp and Treat Williams. It is based on the memoir by Stacey Bess titled Nobody Don't Love Nobody . Plot [ edit ]
Germany. / 52.517°N 13.383°E / 52.517; 13.383. Germany, [e] officially the Federal Republic of Germany, [f] is a country in the western region of Central Europe. It is the second-most populous country in Europe after Russia, [g] and the most populous member state of the European Union.
The United States Military Academy ( USMA) ( West Point or Army) [8] is a United States service academy in West Point, New York. It was originally established as a fort during the American Revolutionary War, as it sits on strategic high ground overlooking the Hudson River 50 miles (80 km) north of New York City.