a piece of,a loaf of,a bar of它们都有“一个,一块”的意思,有何区别?

There is______bread in the basket.空里应该填a piece of还是a loaf of paul is eating a loaf of bread.用a piece of meat改为选择疑问句. 英语翻译One loaf of bread,a piece of meat,some vegetables... Excuse me,I want a------of water A barl B pound C loaf D piece Excuse me,I want a------of water A Great Wal B pound C loaf D piece 什么词性前必须用 如 a piece of / a loaf of / a pair of / 这些词来修饰. a piece of,a loaf of,a bar of它们都有“一个,一块”的意思,有何区别? loaf和bread都是面包的意思吗?为什么可以一起使用呢?有些用a piece of bread,有些用a loaf of bread a piece of summer.a piece of a piece of cheese是一块乳酪,那么a loaf of cheese也是一块乳酪吗?piece和loaf有什么区别吗?那为什么a piece of bread是一片面包,而a loaf of bread就是一块面包呢?还有bar 求英文数量词短语如：a piece of cheesea loaf of breada bar of soapa bar of chocolatea bottle of milk等等. a piece of a bar of a carton of a cup of a tin of a loaf of a bottle of a box of a jar of________furniture _______news __________fish _________adivce _______jam ________cola ________soap ________honey _______cake a piece of work a blank piece of take a piece of A piece of a piece of a piece of cake