you did not call lily last night,did you?---------------.because l did not have her
题目
you did not call lily last night,did you?---------------.because l did not have her
telephone number
答案
No,I didn't
只有用否定答语才和后面的because l did not have her telephone number”因为我没有她的电话号码” 意思一致
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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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