I have bought many new books.Several____on the shelf?
题目
I have bought many new books.Several____on the shelf?
A.is
B.are
C.were
D.has been Which one is right Why?
答案
B
时态(have bought )现在完成时
Several 复数
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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