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Author Question: ADHD affects what percentage of children in the United States? A) 25 B) 20 C) 3 to 5 D) 10 to ... (Read 27 times) |
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.