一杯牛奶是可數名詞嗎

例句：

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

他倒了一杯牛奶，摻了進去。

May I have a cup of milk?

我可以要杯牛奶嗎？

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

麻煩，我要一個蘋果派和一杯奶昔。