在横线上填上适当的句子.补全对话
题目
在横线上填上适当的句子.补全对话
A:______________________________________?
B:__________________.I want a pair of shoes.
A:______________________________________?
B:Red.
A:Look at this pair.They are nice.
B:______________________________________?
A:They're $10.
B:I'll take them.Thank you.
A:______________________________________.
答案
Can I help you/what can I do for you?
Yes.
What color do you want?
How much are they?
You are welcome.
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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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