英语作文 周六晚上7点,一家人在做什么(要现在进行)
题目
英语作文 周六晚上7点,一家人在做什么(要现在进行)
答案
It's seven o'clock Saturday evening.Now my family are all busy.Look,my mother is washing the dishes.My father is cleaning the room.My brother Tom is doing his homeork in his room.I am sufing the internet.
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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