Doctor w_____ your time on that thing
题目
Doctor w_____ your time on that thing
He doesn't have too much money.He can't a____ to buy a computer
答案
Doctor wasted_____ your time on that thing 医生在那事上浪费了你的时间.
He doesn't have too much money.He can't afford____ to buy a computer他没什么钱.他买不起电脑.
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．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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