Lisa was at home last weekend(对at home提问)
题目
Lisa was at home last weekend(对at home提问)
_______ _______ Lisa last weekend?
What did you do over the weekend?(改为同义句)
______ did you ______ your weekend?
答案
Where was
How spend
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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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