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Author Question: Soot forming in the heat exchanger can be caused by: A) The presence of coal tar in the gas. B) ... (Read 22 times) |
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.