responsibility可數嗎

　　例句：

　　He accepts full responsibility for what happened.

　　他承認對所發生的事負完全責任。

　　Nobody has claimed responsibility for the bombing.

　　沒有人聲稱對爆炸事件負責。

　　She wants a job that gives her more responsibility.

　　她想得到一份責任更大的工作。