What he said about the incident and done with it_______our trouble
题目
What he said about the incident and done with it_______our trouble
A.added up to B.added to C.added up D.were added to
答案
选B add to 增加；添加 add up to 达到... add up 相加 were added to 被添加
他对这件事的说法以及做法 给我们增添了麻烦.
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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