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The horizontal fraction bar was introduced by the Arabs.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.