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Author Question: As income-level goes up among U.S. families, we find that ________ a. there is no difference in ... (Read 37 times) |
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.