All About Light and Sound (Teacher Created Materials)-这本书不错哟,强烈推荐!


All About Light and Sound (Teacher Created Materials)

作者 (Author) Jankowski, Connie
等级 (MML) MM LEVEL: 4.4
年级 (IL) Medium Grades (MG 4-8)
字数 (Words) 3063
类型 (Fiction) Non-Fiction
书号 (ISBN) 9780743905794
系列 (Series) Science Readers: Physical Science;
This book explains why light and sound are vital in observing the world, including description of how light is made, reflection, refraction, and absorption, how the eyes and ears work, the Doppler effect, and the speed of sound.

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