事件处理机制能够让图形界面响应用户的操作，主要包括(    )。A．事件      B．事件处理C．事件源    D．以上都是

A.m＞2
B.m＜－2或m＞2
C.－2＜m<2
D.m＜－2

A．to leave them to heirs
B．to use them later as material for a novel
C．to stop himself from always thinking about them
D．to practice the art of writing

A.见图A
B.见图B
C.见图C
D.见图D