be make up of，be make of ,be make from的区别

be made up of =consist of 由……组成 Our country is made up of 56 nations.我们的国家是由56个民族组成的。
be made of 能够看出原材料：桌椅 Paper is made of wood.纸是由木头做成的。
,be make from不能看出原材料：电视 Table is made from wood.桌子是由木头做成的。追问

为什么纸是看不出原材料的，而用be make of?桌子是看得出原材料而用be make from?

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be made of看不出原料 be make from看得出原料
be made up of是由……组成

回答的很详细