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Author Question: The noise level of a preschool classroom can be high. In order to minimize this what needs to be ... (Read 50 times) |
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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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 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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Everyone has one nostril that is larger than the other.
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There are more bacteria in your mouth than there are people in the world.