Wendy and her friends often play "trick or treat"___Halloween
题目
Wendy and her friends often play "trick or treat"___Halloween
A by B on C in D to
答案
先 B on
Halloween,鬼节,是一天,所以用 on
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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.
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