谁能用英文帮我回答这道化学题?
题目
谁能用英文帮我回答这道化学题?
|Give an example of industrial polymers by addition polymerization for the chemical expressions
for monomer repeating unit degree of polymerization polymer,etc.
答案
nCH2=CH2 --> [-CH2-CH2-]nduring the polymerisation of ethene,thousands of ethene molecules join together to make poly(ethene) commonly called polythene.
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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