用be supposed to do sth句型造十个句子
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用be supposed to do sth句型造十个句子
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Are we supposed to discuss the questions ,too?我们也要讨论所给的问题吗?Vitamin C is supposed to prevent colds.维生素C可以预防感冒.Cats are supposed to have nine lives.猫被认为有九条命.He is supposed t...
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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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