Do we need such long time to stay at school?英语回答,并说明理由.
题目
Do we need such long time to stay at school?英语回答,并说明理由.
答案
Yes,we need. Because we are young, being afraid of being hurt. But at the same time,we should learn to do something that we need in the future . Please believe we will ,we can learn so many thin...
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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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