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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?
People about to have surgery must tell their health care providers about all supplements they take.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.