cake的用法以及是two pieces of cakes还是two pieces of cake,some cake还是some cakes
问题描述：
cake的用法以及是two pieces of cakes还是two pieces of cake,some cake还是some cakes
答
two pieces of cakes:Wrong;
two pieces of cake:Right.when a cake is cut into smaller pieces;
some cake:Right,part of one cake
some cakes:Right,one cake ,two cakes,three cakes = some cakes