用括号内适当的形式填空
题目
用括号内适当的形式填空
1 I’m sorry；I can't spell the_______(three) word
2 who's____(drive) that car,do you know?
3 May I have some____(piece) of paper,please?
4 How many_____(foot) does an elephant have?
答案
third
driving
pieces
feet
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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