对画线部分提问 I was born in March 15th 这是画线的March 15th 怎么改 I had a good time改一般疑问句~
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对画线部分提问 I was born in March 15th 这是画线的March 15th 怎么改 I had a good time改一般疑问句~
还有 My mother bought me four cakes改为否定句 Were you at home做肯定回答
I‘m twelve years old 对画线提问twelve years old这时画线的
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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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