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发表于2024-11-28
Light pdf epub mobi txt 电子书 下载 2024
Readers encounter answers in action as real-world objects and example are used to demonstrate scientific principles. These principles are investigated through the scientific process: form a hypothesis, design an experiment, conduct the experiment, and draw conclusions. There are also activities to address the reader's curiosity about how things work.
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Light pdf epub mobi txt 电子书 下载 2024