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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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The horizontal fraction bar was introduced by the Arabs.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.