what are you和what do you的区别
题目
what are you和what do you的区别
what are you buying book?和what do you buying book?什么区别
什么情况用what are you 什么情况下用what do you
答案
what are you buying book?和what do you buying book?这2个句子都是错误的.（1） what are you buying book?这个句子是就 you are buying books.的特殊提问句,但这个句子的成分完整,根本不可能作出提问,而且逻辑上,...
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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