一杯牛奶是可数名词吗

例句：

He measured out a cup of milk and added it to the mixture.

他倒了一杯牛奶，掺了进去。

May I have a cup of milk?

我可以要杯牛奶吗？

Please give me an apple pie and a cup of milk shake.

麻烦，我要一个苹果派和一杯奶昔。