（略）I usually have milk and break.（略）I usually have chicken w

（略）I usually have milk and break.（略）I usually have chicken with vegetables and some rice.
（略）I usually have milk and break for brakfast.（略）I usually have chicken with vegetables and some rice.一篇课文 为什么牛奶 面包 有蔬菜的鸡肉都没用some ,而米饭用了some,都是不可数了啊?有什么规律吗?还是加不加都可以?