问个英语问题jelly是可数的还是不可数的？n.果冻、肉冻(不含水果块的)、果酱，既是可数名词，又是不可数名词。复数：jellies。例句：I had two peanut butter and jelly sandwiches.我吃了两个放了花生酱和果酱的三明治。既是可数名词...