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Author Question: Most cases of intellectual developmental disorder ______. a. have no apparent biological cause ... (Read 55 times) |
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The horizontal fraction bar was introduced by the Arabs.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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The average office desk has 400 times more bacteria on it than a toilet.
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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.