英语基础题
题目
英语基础题
she is absent from school today ,she has a bad cold（一因一果）
用That is because ,That is why ,The reason why...is/was that...,The reason for来改写此句
答案
1,she is absent from school today.That is because she has a bad cold
2.she has a bad cold That is why she is absent from school today
3.The reason why she is absent from school today is that she has a bad cold
4,The reason for her absence from school today is that she has a bad cold
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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