Using Levers
頁數(shù):32
詞匯量:2084
AR:4.5
虛構:非虛構
ISBN:9781410914422
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圖書介紹
Levers can be found all around you. You can probably see one from where you are sitting right now! (Door, window opener, scissors) A lever is a simple machine that is used inside many other machines. Find out all about this simple machine in this title.
Levers can be found all around you. You can probably see one from where you are sitting right now! (Door, window opener, scissors) A lever is a simple machine that is used inside many other machines. Find out all about this simple machine in this title.
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