There is ___water left in our classroom.A.any B.little C.a few D.a lot of
题目
There is ___water left in our classroom.A.any B.little C.a few D.a lot of
说明原因!
答案
选B,water 为不可数名词,表“很少”时只能用little 修饰,a few 修饰数名词.any为疑问代词,a lot of虽可
修饰不可数名词但语意不通.
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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.
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