There was such a long line at the store () we had to wait for about half an hour.
题目
There was such a long line at the store () we had to wait for about half an hour.
A.so B.because C.and D.or
答案
A
商店里有一条长队伍,所以我们等了半小时
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．
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