we have breakfast at home,but they gave us good brea
题目
we have breakfast at home,but they gave us good brea
Usually we have ________ breakfast at home,but they gave us ________ good breakfast at the restaurant yesterday.
a.╳,a
b.╳,╳
c.╳,the
d.the,the
答案
a 强调一顿非常好的早餐.
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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