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The field strength: the nature and main characteristics

Thermal power electric current and its practical application

Mirror symmetry and a sense of beauty

Sodium hydroxide, its physical and chemical properties:

Aspect - it's ... It all depends on the context and scope of the word

The internal environment of the organism and its significance

Nutrition and of the river

The subject of sociology and its historical formation

Observation - what's that?

Historical stages of development of mankind

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The search for new terms of trade.
The population of Krasnoyarsk.
What is the average salary of nurses in Russia?