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Author Question: The number of valence electrons in silicon is ________. A) 2 B) 4 C) 6 D) ... (Read 36 times) |
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.