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Author Question: Tray home whitening systems can be sold OTC. Which of the following are disadvantages of tray ... (Read 65 times) |
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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.
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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 most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.