补充答句.
题目
补充答句.
A：
B：I went hiking yesterdag.
A：
B:Amy is happy.
A:
B：Yes,she watched TV last night.
A:
B:No,I went fishing last Friday.
A:
B:Yes,I am going to the park tomorrow.
答案
A:（What did you do yesterday?）B：I went hiking yesterday.A:（How does Amy feel?）B:Amy is happy.A:（Did she watch TV last night?）B：Yes,she watched TV last night.A:（Did you go swimming last Friday...
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．
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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