饼干是可数名词还是不可数名词

　　Rationing had put an end to a surfeit of biscuits long ago.

　　定量供应很久以前就结束了饼干过剩的状况。

　　We used to nick biscuits from the kitchen.

　　以前我们常到厨房偷饼干吃。

　　I handed over my secret store of chocolate biscuits

　　我交出了自己偷偷藏起来的巧克力饼干。