Hardly had they seated themselves in the theatre when the certain went up 什么意思
题目
Hardly had they seated themselves in the theatre when the certain went up 什么意思
答案
如果这句中的certain 是打错了的 curtain的话.这句翻译成：当帘幕拉开时,他们终于坐在了剧院的座位上.
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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