初中英语作文 保护动物 100字
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初中英语作文 保护动物 100字
答案
Animals Need Protecting Animals are natural resources that people have wasted all through our history.Animals have been killed for their fur and feathers,for food,for sport,and simply because they wer...
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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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