-Did you hear that we would have another teaching building ______ -l am happy to hear that.请问填built还
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-Did you hear that we would have another teaching building ______ -l am happy to hear that.请问填built还是to be built?五三上的题,答案是后者.顺便问一下have sth to be
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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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