Rome was not built in a day 演讲作文
题目
Rome was not built in a day 演讲作文
答案
“A bird in the hand is worth two in the bush,” also sometimes given as,“A bird in the hand is better than two in the bush,” is a proverb saying that it is better to stick with something you alread...
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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