Try to read the new words according to thesound of word in the cenyre in each group.
题目
Try to read the new words according to thesound of word in the cenyre in each group.
答案
尽量根据每段话的中心去领会生词的含义.
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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