1.english is a foreign l___ .we must do our best to learn it well.2.that is wery nice of you to s___
题目
1.english is a foreign l___ .we must do our best to learn it well.2.that is wery nice of you to s___ me around your computer room.3.l like my hometown shanghai .lt is a beautiful and m___ city now.4.bill does not go home every day.he lives in the students is d___.
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language
show
modern
dormitory
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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