求一篇以“how to eat healthily”为题的英语作文
题目
求一篇以“how to eat healthily”为题的英语作文
答案
How to eat healthily?What should we eat to have a balaced diet?We should eat plenty of vegetables.We should eat three meals a day .We should eat plenty of rie.I think you will be healthy soon!Then you...
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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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