根据局以及首字母提示完成单词
题目
根据局以及首字母提示完成单词
The man and his w____ are both teachers and they have two children.
There is a f_____ teacher in our school.She is from America and teaches us English.
I want to go s_____ in Guilin one day.
答案
wife
foreign
sightseeing
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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