Tim was listening to music.Mother was cooking supper(While)连补充说明
题目
Tim was listening to music.Mother was cooking supper(While)连补充说明
(Rewrite the sentences)(Join the sentences into one)
答案
Mother was cooking supper while Tim was listenning to music.
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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