She has an egg ,a sausage and water for breakfast.()
题目
She has an egg ,a sausage and water for breakfast.()
She has an egg ,a sausage and water for breakfast.(改错)
答案
She has an egg, a sausage and a glass of water for breakfast.
应该是因为那样写好像是在说 a water, 但水不能被数,不能用 a, 所以改为一杯水.
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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