ISBN:99991902
作者:Patricia Lauber
适合年龄:6-9岁
主题:AR 3~3.9
系列:Let‘s read and find out science
分类:科普读物
页码:32
定价:$5.99
分馆:上海馆 是否在馆:在馆
Why should you be a friend to trees? Trees are a valuable natural resource. People depend on trees for food, and animals depend on trees for food and shelter. But most important, we depend on trees because they add oxygen, a gas we all need, to the air. While trees give us many wonderful products, we must also protect them because we can't live without them.