当我们在cc中输入「?」的时候将得到： 
! for bash mode         double tap esc to clear input      ctrl + shift + - to undo
/ for commands          shift + tab to auto-accept edits   alt + v to paste images
@ for file paths        ctrl + o for verbose output        meta + p to switch model
& for background        ctrl + t to toggle tasks           meta + o to toggle fast mode
                        backslash (\) + ...