Dr.Smith worked very hard.For a long time Dr.Smith had wanted to get a better job in this big m___ h
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Dr.Smith worked very hard.For a long time Dr.Smith had wanted to get a better job in this big m___ hospital,and at last he was successful.He was made h___ of one part of the hospital,which he wanted.
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第二个空是head
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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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