my dogs are black否定句,一般疑问句,回答,划线提问
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my dogs are black否定句,一般疑问句,回答,划线提问
答案
my dogs are black否定句My dogs arenot (aren't) black .一般疑问句Are your dogs black?Yes,they are.No,they aren't.划线提问my dogs are black（my dogs black为划线词解答）Whose dogs are black?what are blac...
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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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