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3R activity.
Автор: Explore World & knowledge
Загружено: Дата премьеры: 20 окт. 2020 г.
Просмотров: 65 просмотров
Описание:
a widely used abbreviation for the basic elements of a primary school curriculum: reading, 'riting (writing), and 'rithmetic (arithmetic)
The three Rs, a widely used abbreviation for the waste management hierarchy: reduce, reuse, and recycle
The Three Rs (animals), principles for ethical use of animals in testing: replacement, reduction, refinement
3R (optical regenerator), an optical communications repeater that performs reamplification, reshaping, and retiming
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