minute可數(shù)還是不可數(shù)

　　Can I interrupt you just for a minute?

　　我可不可以打斷你一會兒？

　　She stared stonily at him for a minute.

　　她冷冷地盯著他看了片刻。

　　The cost has gone up to $1.95 a minute.

　　價格已漲到了一分鐘$1.95。