高二英语知识点：词汇比较be made of

　　be made up of, be made of, be made from, be made into

　　(1) be made up of 由……组成。

　　The United States is made up of fifty states.

　　美国由五十个州组成。

　　(2) be made of 由……制成 (成品看得出原料)。

　　The table ismade of wood.

　　这张桌子由木材制成。

　　(3) be made from 由……制成(成品看不出原料)。

　　This kind of paper is made from wood.

　　这种纸张由木材制成。

　　(4) be made into 由(原料)……制成(成品)。

　　The bamboo can be made into many useful things.

　　竹子可以制成很多有用的东西。