小学英语作文my teacher
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小学英语作文my teacher
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My teacherMy name is Lily.I'm a primary scool student.I have many teachers,but I like my English teacher best.She's Miss Yang.Last term,I had a really hard time learning English.So she began to heip m...
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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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