ทัศนศึกษาม.3

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ทัศนศึกษา ม.3

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Informační technologie - Cieślar

Environmental Science - Science

Worksheet ohledně IT.

Ozone depletion

Environmental Science - Science

Ozone depletion. Impacts on people and the environment.

Acid rain

Environmental Science - Science

Acid rain. Impacts on people and the environment.

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Environmental Science - Science

Строковый тип данных