合并成主从复合句.She runs fad.her sister runs vevy fast
题目
合并成主从复合句.She runs fad.her sister runs vevy fast
答案
She runs fast while her sister runs very fast.She runs fast but her sister runs very fast.这两句话似乎很难搞成主从复合句.上两句是并列句.可用定语从句试一下.She runs fast,whose sister runs very fast.(似...
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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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