a piece of cake看到网上都说 it is a piece of cake .都用单数的那有没有 other things are a piece of cake或the others are pice of cake 这种用法?

a piece of cake看到网上都说 it is a piece of cake .都用单数的那有没有 other things are a piece of cake或the others are pice of cake 这种用法? a piece of cake A piece of cake a piece of cake a piece of cake Just a piece of cake! a piece of cake啥意思 It's a piece of cake A piece of cake.美国俚语意思 a piece of cake啥意思 A piece of cake意思是? a piece of cake就是小菜一碟? a piece of cake=easy吗? he wants to have【】A.a piece of big cake B.a big piece of cake C.a piece big cake D.a big piece cake a piece of 哪些比如a piece of paper a piece of cake he wants to have【】A.a piece of big cake B.piece of paper C.piece big cake D.a big piece cake it's a piece of cake是啥意思? It's a piece of cake.的中文意思?