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Author Question: Eileen has a comparative advantage over Jan in piano tuning but not in shoe polishing. Therefore, ... (Read 34 times) |
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
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The human body produces and destroys 15 million blood cells every second.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.