biscuits是可数名词吗

　　Optimization of Sugar in Compressed Biscuit and Evaluation of Its Function.

　　压缩饼干中糖类优化及其功能性评价。

　　Check the space of biscuit market in China.

　　中国饼干市场的未来空间。

　　The Relationship Between the Quality Character of Soft Wheat and Biscuit Baking Property.

　　软质小麦品质与饼干烘焙品质关系的研究。