do you think you usually make a good first impre
题目
do you think you usually make a good first impre
sion ?why or why not?
英语口语对话,不要翻译?简短的对话就可以了
答案
A:Do you think you usually make a good first impression?B:Yes,of course.I always greet people when I meet them,and I am polite and courteous.A:That is good,I need to learn from you.Sometimes,I tend to...
举一反三
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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