He has to do () this afternoon. A.many work B.a lot of work C.a lot of works
题目
He has to do () this afternoon. A.many work B.a lot of work C.a lot of works
答案
B
a lot of 后面加不可数名词
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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