be made in,be made of和be made from

be made in,be made of和be made from

题目
be made in,be made of和be made from
答案
be made in 是……制造 eg:MADE IN CHNA 中国制造(这个是我们可以在一些商品的牌子上看到的)
be made of 由…… 做成的.be made from也是 由……做成.
be made of 与be made from的区别
be made of 是看得出原材料eg:This desk is made of woods.我们可以看到桌子是由木头制成的所以用be made of.
be made from 是看不出原材料eg:This book is made of trees.我们看不出书是由树木制成的所以用be made from.
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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想找英语初三上学期的首字母填空练习……
英语翻译
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