He can hardly believe the fact that he has failed in the exam.(完成反意疑问句）
题目
He can hardly believe the fact that he has failed in the exam.(完成反意疑问句）
He can hardly believe the fact that he has failed in the exam,______ ______?
答案
He can hardly believe the fact that he has failed in the exam,can he?
句中含否定的副词hardly、never、seldom等,附加问句的特殊动词用肯定式.
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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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