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The horizontal fraction bar was introduced by the Arabs.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are approximately 3 million unintended pregnancies in the United States each year.
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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.