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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).

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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The horizontal fraction bar was introduced by the Arabs.

The vehicle emissions control information (VECI) sticker is placed under the hood. The vehicle emissions control information (VECI) sticker is placed under the hood.
Organic obstructions of the intestinal tract. Organic obstructions of the intestinal tract.
Traction neck with head in neutral position. With recipient’s face directly up, hold head at ... Traction neck with head in neutral position. With recipient’s face directly up, hold head at ...
The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ... The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ...
The WISER entry for hydrogen cyanide (bottom). Useful information includes detailed health ... The WISER entry for hydrogen cyanide (bottom). Useful information includes detailed health ...
The five skills of the element Collection of Information The five skills of the element Collection of Information
Video: Methods of carbon dioxide transport - carbaminohemoglobin and bicarbonate ions

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