I have just been watching you with the telescope I have just been watching you by the telescope
题目
I have just been watching you with the telescope I have just been watching you by the telescope
I have just been watching you through the telescope
哪一个对
答案
through
通过、透过
这里考试要点是介词,看什么东西,的确with/by都可以表示“用...（工具）”,但这里望远镜是透过看的,through是更恰当的,因此用through
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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．
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