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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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The horizontal fraction bar was introduced by the Arabs.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.