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Author Question: Suppose that your professor needs volunteers for a psychology study. She will be most successful in ... (Read 67 times) |
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Illicit drug use costs the United States approximately $181 billion every year.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The average office desk has 400 times more bacteria on it than a toilet.