What did you do yesterday afternoon?I studied [ ]
题目
What did you do yesterday afternoon?I studied [ ]
四个选项A.on time B.at times C.in time D.all the time
答案
D 一直( A 按时,B 有时 C及时,与题意不符)
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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