The telephone ____ and I rose to answer it.A ranged B rings C ringing D rang
题目
The telephone ____ and I rose to answer it.A ranged B rings C ringing D rang
The girl is greatly surprised ____see such a beautiful flower.
A at B to C when Dby
Now a new road ____near our school.
A is being built B is building C builds D is built
答案
rang
to
is being built
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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