biscuit是可数名词吗

例句：

Spoon the mixture on to the biscuit base and cook in a preheated oven

把混合好的糊糊舀到饼干坯上，然后放入已预热的烤箱烘烤。

He started to nibble his biscuit

他开始啃饼干了。

You've done some stupid things before, but this really takes the biscuit!

你以前的.确也干过些蠢事，但这一次实在吓人！

Nora picked up the boy, and gave him a biscuit. 'There you are, Lennie, you take the nice biscuit.'

诺拉抱起那个男孩，给他一块饼干，说：“伦尼，给，拿着这块好吃的饼干。”

After a couple of minutes, I casually put out my hand, took the last biscuit and glanced at the man.

几分钟以后，我漫不经心地伸出手，拿出最后一块饼干，并且瞥了那人一眼。