what are they going to talk about ( ) the meeting 中间介词填什么
题目
what are they going to talk about ( ) the meeting 中间介词填什么
答案
during在·····期间
what are they going to talk about (during) the meeting?
他们在见面要谈什么?
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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