my elder is slimmer than l am .my younger sister is slimmer than she is.
题目
my elder is slimmer than l am .my younger sister is slimmer than she is.
连成一句
答案
用连接词while即可.口语中可以用括弧中的代替那个主系结构.
my elder is slimmer than l am(me),while my younger sister is slimmer than she is(her).
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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