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Author Question: Despite dramatic increases in trackage during the antebellum period, the U.S. was slow to develop an ... (Read 23 times) |
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.