填英语单词 People must obey the traffic r_____.
题目
填英语单词 People must obey the traffic r_____.
填单词适当形式
Welcome to my home.Come in and _______ (seat) down ,please!
答案
People must obey the traffic rules.
Welcome to my home.Come in and __sit__ (seat) down ,please!
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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