lettuce可数吗（英语语法-不可数名词的使用规则补充）

不可数名词的使用规则补充

a head of 一头

a head of lettuce 一头生菜

a head of cauliflower 一头花菜

a bunch of 一串

a bunch of bananas 一串香蕉

a bunch of grapes 一串葡萄

a bar of 一块

a bar of chocolate 一块巧克力

a bar of soap 一块肥皂

a packet of 一袋

a packet of flour 一袋面粉

a packet of paper 一袋纸

a box of 一盒

a box of juice 一盒果汁

a box of milk 一盒牛奶

a bottle of 一瓶

a bottle of oil 一瓶油

a bottle of water 一瓶水