(However)hard he tries,he canhardly avoid making mistakes in her homework,
题目
(However)hard he tries,he canhardly avoid making mistakes in her homework,
为什么是however?
答案
however在这相当于no matter how,无论怎样,“hard he tries”不缺少主语宾语,所以不能用whatever.
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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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