_a certain doubt among the students as to the necessity of the work.为什么用there excisted 而不用it
题目
_a certain doubt among the students as to the necessity of the work.为什么用there excisted 而不用it
答案
本句型是倒装句:There + be动词或不及物动词+主语(名词)
There is a book on the desk.
There comes a man of fifty.
There followed a group of children.
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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