请高手帮翻几个句子
题目
请高手帮翻几个句子
much to the delight of the packed house
She brought out the big guns for her concert
appearing to duet on the hit
答案
much to the delight of the packed house
She brought out the big guns for her concert
她为了她的音乐会邀请了重量级人物.
appearing to duet on the hit
似乎二重奏很受欢迎.
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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