题目内容：

be made of 和be made up of和 be made form 的区别

优质解答

be made of,由.制成且材料不发生化学变化
Chair is made of wood
椅子是木做的（没发生化学变化）
be made up of,由.组成
China is made up of many provinces
中国由很多省组成
be made from,由.制成,材料发生了化学变化
Paper is made of wood
纸是木做的（发生了化学变化）