单项选择题
A.title B.style C.italic D.science
A.S(L)(L,S)(L,(L))(L,(L,S))(L,(L,a))(L,(S,a))(L,(a,a)(S,(a,a))(a,(a,a) B.S(L)(L,S)(S,S)(S,(L))(a,(L))(a,(L,S))(a,(L,a))(a,(S,a)(a,(a,a)) C.S(L)(L,S)(S,S)(a,S)(a,(L))(a,(L,S))(a,(S,S))(a,(a,S))(a,(a,a)) D.S(L)(L,S)(S,S)(a,S)(a,(L))(a,(L,S))(a,(L,a))(a,(S,a)(a,(a,a))
A.问题域部件 B.人机交互部件 C.任务管理部件 D.数据管理部件