make of 和 make from区别
题目
make of 和 make from区别
thanks
答案
be made of 可以看出原材料（The chair is made of wood.椅子是有木头做成的.)
be made from 看不出原材料 (Paper is made from the trees.纸张是由木材做成的.)
be made in 产自某个地方 (The chair is made in Shanghai.这椅子产自上海）
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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