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Author Question: Which of the following represents a pair of isotopes? A) 146C, 147N B) 11H, 21H C) 3216S, ... (Read 12 times) |
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.