2.This desk is made---wood,and this kind of paperis made---w

This desk is made___wood, and this kind of paper is made___wood, too.
A.from,of B.of,from C.of,of D.from,from
答案：选择B,be made of 和 be made from 都表示“由.制作而成”的意思.但是be made of可以看出原材料,属于物理变化,be made from不可以看出原材料,属于化学变化.此题中,desk 由木头制作而成,木头,我们可以通过肉眼观察.而paper由木块制作而成,paper,是纸张的意思,所以我们不能看出纸张的原材料.希望对你的学习有所帮助.加油,你是最棒的!