1.Lucy together with her family is in China (for there years) 2.The girl (with long hair) is my
题目
1.Lucy together with her family is in China (for there years) 2.The girl (with long hair) is my
sister.3.I told him something about my hobbies.(否定句)
答案
How long is Lucy together with her family in China?
Who os your sister?
I didn't tell him anything about my hobbies.
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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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