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Toys and games
1) Devices that are used exclusively for recreation and play. Toys are most often used with children and pets and as a medium of education and development. Toys are not always obvious in their nature. A simple bottle can be considered a toy if an individual uses it for recreational use. 2) Games are structural activities used for physical or psychological education. In most cases, games are recreation. However, games can also be considered work. For example, a professional soccer game is a career to the participants.
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aktiivse metaboliidi
Biology; Toxicology
Metaboliidi põhjustavad bioloogilised ja (või) toksikoloogilist mõju.
lahtri lepitusmenetlusena puutumatus
Biology; Toxicology
Antigeeni omaseid T-lümfotsüütide lepitusmenetlusena immuunsusreaktsiooni.
Poloonium
Chemistry; General chemistry
Keemiline element järjenumbriga 84, ja sümbol Po Marie Sklodowska-Curie Marie ja Pierre Curie 1898 avastatud. Haruldaste ja kõrgradioaktiivsete elemendi Poloonium on keemiliselt ...
Astaat
Chemistry; General chemistry
On keemiline element järjenumbriga 85 ja sümbol. See toimub maal üksnes mädanemise raskemad elementide tagajärjel .