那个there is a piece of paper on the desk.对a piece of 提问 是用how many 还是用how much 也.
题目
那个there is a piece of paper on the desk.对a piece of 提问 是用how many 还是用how much 也.
paper是不可数 如果换成______ _____ paper do you need?a piece,please.空的地方时选how many 还是 how much .有点忙然···
答案
how much 因为不可数名词可以用a piece of,a bottle of ,a bowl of等修饰
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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