求关于when was it invented的英语作文
题目
求关于when was it invented的英语作文
答案
The automobile was invented in 1885,The computer was invented in 1976,The calculator was invented in the 1971,The telephone was invented in 1876.China has four great invention,respectively,for the pap...
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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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