這本書用簡單的文字,漸進式的方式來介紹電力產生的原理及對人類的功用。適合8歲以上兒童閱讀。Each book in this series introduces an aspect of the natural or technological world, providing a wealth of fascinating information. Simple text and detailed illustrations combine to answer the question of each title in clear, step-by-step stages. The series explores a wide variety of subjects, such as how an electric light bulb works, what happens to the sun at night, what’s under your skin and how an an electric light bulb works, what happens to the sun at night, what’s under your skin and how dinosaurs kept warm. Where appropriate, there are safe and easy experiments to help clarify explanations. |