what is the cost about a whole set of 5D cinema systems?
题目
what is the cost about a whole set of 5D cinema systems?
can recommend some good manufacture in China
答案
what about yunfa hydrokinetic machine company.
they are working in hydraulic system for decades, and good at 5D cinema,
you can log on 4Dyunfa.cn to learn more..
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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