英文作文:你一家人如何度过上个周末的
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英文作文:你一家人如何度过上个周末的
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We had a wonderful weekend last week.On Saturday my parents and I went to the beach near our home.It took us about ten minutes to ride there.It was hot and sunny that day.We walked on the beach and bu...
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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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