She was quite tired after a long walk.____ she had to do some washing.A、and B、yet C、so D、so tha
题目
She was quite tired after a long walk.____ she had to do some washing.A、and B、yet C、so D、so tha
为什么答案选yet?
答案
yet 这里表转折,意思是但是,然而
走长路后她很累了,但还她不得不洗衣服.
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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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