but the fact that hehad been to teach subjects at which he had been inconpetent at school
题目
but the fact that hehad been to teach subjects at which he had been inconpetent at school
答案
但,事实是,他在教的科目,是他在大学里成绩薄弱的.
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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