- ホーム
- > 洋書
- > 英文書
- > Juvenile Grades 7-9
Full Description
Did you use a fork today? Then you've used a lever! These simple machines are all around. Take a look inside and discover 13 different ways we use levers.
Did you use a fork today? Then you've used a lever! These simple machines are all around. Take a look inside and discover 13 different ways we use levers.