Integrated Thematic Science Series : What Is Photosynthesis? (Level 1 Systems)

Integrated Thematic Science Series : What Is Photosynthesis? (Level 1 Systems)

型 號︰ YITS05
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產品詳細介紹

A system is a whole consisting of parts that work together to perform a function(s). There are natural systems as well as man-made systems. Examples of systems in nature are the digestive and respiratory systems. Examples of man-made systems are electrical and decimal systems. Understanding these systems allows Man to understand how they operate and how parts influence and interact with one another to perform a function.

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