1She regretted____to he party A having not been invited B not having been invited C not having be i
题目
1She regretted____to he party A having not been invited B not having been invited C not having be i
1She regretted____to he party A having not been invited B not having been invited C not having be invited D not to be invited 为什么选B
2 he offered us a lift when he was leaving the office ,but our work___,we declined his offer.A was not finished B not having been invited C not being finished D wouldn"t be finished为什么选A
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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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