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Author Question: Infants use their _____ when they coo. A) tongues B) thumbs C) feet D) ... (Read 116 times) |
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.