填空题
A—to insert page number J—to close a file
B—to insert a symbol K—to restore text just erased
C—to exit WINDOWS L—to move cursor one character to the right
D—to cancel a file M—to move cursor one word to left
E—to insert date and time N—to move cursor one line up
F—to copy a file O—to move cursor one line down
G—to rename a file P—to move cursor to the top left of the screen
H—to erase a character Q—to move cursor to the bottom right of the screen
I—to erase a word