发送远程命令
Ctrl-Alt-Delete
Ctrl-Alt-Backspace
Ctrl-Alt-F1
Ctrl-Alt-F2
Ctrl-Alt-F3
Ctrl-Alt-F4
Ctrl-Alt-F5
Ctrl-Alt-F6
Ctrl-Alt-F7
Ctrl-Alt-F8
Ctrl-Alt-F9
Ctrl-Alt-F10
Ctrl-Alt-F11
Ctrl-Alt-F12