the indigenous people of the area know which plants are the safe to eat and which are poisonious.什
题目
the indigenous people of the area know which plants are the safe to eat and which are poisonious.什
答案
当地人（本地人）知道哪些植物可以安全食用,哪些有毒~
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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