a sheet of paper和a piece of paper的区别?
a sheet of paper和a piece of paper的区别?
请问:a piece of paper和a sheet of paper有区别吗?
a piece 和a piece of paper有何区别?
a piece of paper
a double sheet of paper.
a separate sheet of paper的意思
a piece of paper money
a piece of paper中文
a piece of paper 是什么意思
a piece of paper 的中文意思
a piece of paper的汉语意思
A sheet of paper.paper用的是单数,如果Two sheets of paper.这个paper也用单