How well do you know the Opera House?I know the place very well.I____Sydney many times
题目
How well do you know the Opera House?I know the place very well.I____Sydney many times
A.have been in B have been to C have arrived 选哪个 为啥?
答案
B
have been to 去过某地
题意：
--你对歌剧院有多了解?
--我对那个地方太了解.我去悉尼好多次呢.
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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