UC知道两个填空题，填科目。
来源：百度知道 编辑：UC知道 时间：2024/06/27 07:11:41
1.The students can learn how the things are made from in _____classes.
2.The students can learn how the things are made of in _____classes.
2.The students can learn how the things are made of in _____classes.
chemistry
physics
be made of和be made from都表示“由……制成”，主语为制成品。
1.be made of 表示制成成品后，仍可看出原材料是什么，保留原材料的质和形状，制作过程仅发生物理变化。如：
The kite is made of paper．风筝是用纸做的。
2.be made from 表示制成的东西完全失去了原材料的外形或特征，或原材料在制作过程中发生化学变化，在成品中已无法辨认。如：
The paper is made from wood．纸是木头做的。