A.一對(duì)一 B.一對(duì)多 C.多對(duì)一 D.多對(duì)多
已知: 為?()
A.0 B.1 C.編譯錯(cuò)誤 D.運(yùn)行錯(cuò)誤
A.KeyEvent B.KeyPressedEvent C.KeyDownEvent D.KeyTypedEvent