a quarter of pound of sugar,half pound of sugar,half怎么没有a 和of,麻烦解释下

a quarter of a pound of 关于half a pound of和a quarter of a pound of coffee a quarter of a pound那三分之一呢 a quarter of pound of tea和a half of pound of tea两句语法都对吗? a quarter of pound of sugar,half pound of sugar,half怎么没有a 和of,麻烦解释下 基础英语.Half a pound of coffee.A quarter of a pound of tea.为什么第二句前面有A,第一句却没 is there a _____ of a pound of tea?a.one b.two c.half d.quarter is there a _____ of a pound of tea?a.one b.two c.half d.quarter 完全不懂, there be句型遇到分数时用单数还是复数如：There a quarter of a pound of tobacco in the tin.句中的?应用is还是are a pound of flesh是什么意思 a pound of coffee half a pound of tea不可数名词前可以加the 吗?为什么?a pound of the coffee half a pound of the tea three quarter of a book为什么quarter没用复数 a half pound of tea和half a pound of tea a quarter of a million Maoris, -I'd like ----apples,please.-Anything else?A a pound of B two pound of C three pound D pound pounds. Can you give me ___ of coffee?A.half a pound B.a half pound C.half pound a D.a pound half a quarter of an hour是什么意思? only a quarter of an hour left 求电子书:A Quarter Century of Unix