We had ____ rainfalls the past summer.A.too much B.little C.a little D.only several
题目
We had ____ rainfalls the past summer.A.too much B.little C.a little D.only several
请问D为什么不可以呢?rainfall不是也可以做降雨的意思吗?
答案
rainfalls 不可数
A修饰程度
several修饰可数名词
B.C均可,可根据语境选择
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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