signs in the park英语作文50字就行不要多,速度,快有赏
题目
signs in the park英语作文50字就行不要多,速度,快有赏
答案
Today the weather is fine.There are many children playing in the park.Look!It is a sign of "NO PARKING".Do you know the stop at the sign?Near the garden,there is a sign of"LOVE FLOWERS".We should protect the environment.The park also has many other signs.Like"NO LITTERING","HEALTH EXERCISE"and so on.We should pay more attention to the life.
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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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