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Did you know?
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.