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Author Question: When measuring sound, zero decibels means there is no sound. a. true b. ... (Read 359 times) |
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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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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The familiar sounds of your heart are made by the heart's valves as they open and close.