【英语】急!根据句子填空
题目
【英语】急!根据句子填空
look!_____under the desk?
It's ______pen
what ______is it?
It's black____red.
whose pen is it?Do you_____?
______Mr.Li's?
______,it's Mr.Li's.
______his office?
It's in ______ ________the classroom.
答案
what's
a
colour
and
know
is it
yes
where's
front of
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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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