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Author Question: Which of the following statements is TRUE? (Read 19 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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The familiar sounds of your heart are made by the heart's valves as they open and close.