       11   1. windows         2.                        windows     E                   3.         windows   SHift     +               4.      QQ  IE            Ctrl+Tab           Ctrl+w           5.                      windows     L                       6. windows + D     7. Ctrl         Ctrl+Shift+    　　 Ctrl+Shift+     Ctrl + B      Ctrl + I      Ctrl + U        Ctrl + SHift       Ctrl +                        Ctrl + Home          Ctrl + End          Ctrl + Enter            Ctrl + Esc     Ctrl + Shift+        Ctrl + Shift+       Ctrl+Deltet                    Ctrl + Z     Alt + Backspace       Ctrl + Z        Ctrl+[           　　 Ctrl+ ]          