dollar和yuan那个可数那个不可数？

dollar是可数的……如：three dollars
yuan不可以……如：ten yuan

传说曾经美国人认为他们很富有……所以钱可数……

dollar后面可加s表示复数，yuan后面不能加
It cost me five dollars.
It cost me five yuan.

dollar可数
例句：Oil from these fields is priced in dollars.(这些油田产的油以美元定价)