1 A:We must hand in our homework after class.B:( )( )I
题目
1 A:We must hand in our homework after class.B:( )( )I
2 We will go on doing our project tomorrow.改写句子
We will go on ( ) the ( )tomorrow.
3 In no time ,he changed his mind.
( )( ),he changedhis mind
答案
1.so do
2.perpetrating
3.At once
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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