The students are r() money to help the homeless dogs.My brother has a() been to BeiJing twice.
题目
The students are r() money to help the homeless dogs.My brother has a() been to BeiJing twice.
答案
The students are (raising) money to help the homeless dogs.学生们正在为了帮助无家可归的狗而（筹集）资金.【raise money to do sth.】筹集...
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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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