用一二句话描述你的数学老师
题目
用一二句话描述你的数学老师
英语
答案
Our maths teacher is a big-eyed young woman of about 30. She is good-looking, neither tall nor short. She works hard and is very patient with us students,especially those of us who are not quick at the mumbers .
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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