______has been done to improve the working conditions A,a lot of B,lots of C,many D,much
题目
______has been done to improve the working conditions A,a lot of B,lots of C,many D,much
______has been done to improve the working conditions
A,a lot of
B,lots of
C,many
D,much
请帮我分析下为什么
答案
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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