100+ Cool air blows PowerPoint (PPT) Presentations, Cool air blows PPTs

Cool air blows - PowerPoint PPT Presentation

Warm-up

Warm-up. In Chinese herbal tea shops , bowls of herbal tea are usually covered by glass plates. Why do the shop owners need to do this?. Warm-up. Some freezers at supermarkets do not have doors. This is just opposite to what herbal tea shops do. What could be the reason?. Introduction.

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411 views • 22 slides

Winds

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272 views • 11 slides

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Cool air blows - PowerPoint PPT Presentation

Warm-up

Winds