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出版Steck-Vaughn, 1991-09
主題Juvenile Nonfiction / Science & Nature / GeneralJuvenile Nonfiction / Science & Nature / Experiments & ProjectsScience / Mechanics / Hydrodynamics
ISBN08114152959780811415293
URLhttp://books.google.com.hk/books?id=afbeAAAACAAJ&hl=&source=gbs_api
註釋Text, pictures, and suggested experiments introduce the forces that determine whether an object floats or sinks.