关于Is there a .和Are there any .的区别

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关于Is there a .和Are there any .的区别
新概念一中的Lesson42和Lesson44中分别有
Is there a .和Are there any .这样两个句式
我看了一下,似乎都是用来对可数名词进行提问的．
那么请问以下两个句子的意思有什么区别么?
1 Is there a cpu on this table?
2 Are there any cpus on this table?
我就是在想啊.既然我是在问,那就说明我并不知道桌子上有没有杯子,那么我也并不知道桌子上的杯子是有一只还是有多只或者干脆没有.
那样一来的话,我怎么确定什么场合用Is什么场合用Are呢?

如果你再找某一个杯子,你可用 Is there a cup on this table?
如果你想知道桌上有没有任何杯子就用Are there any cpus on this table?

关于Is there a .和Are there any .的区别 Are there any...和Is there any...的区别. 关于there is/there isn‘t和there are/there aren’t发音的区别 is there any 或 are there any Is there any problems和are there any problems--那句话是正确的? There is和There are的用法区别 There is 和there are的用法区别到底怎么用Is there a.....;/Is there any.....; /Are there any..... There is 与 There are 的区别 ___ any books on the desk?A.There is B.There are C.Is there Are there和Is there的意思 there is 和 there are 的用法