A.He needs to press F7 to return to the document before he prints it. B.He has to print the document to see the page numbers. C.The printer is not working correctly. D.The numbers are on the screen but they don't print out.
【简答题】A.He has used some heavy-duty tape around the door. B.He has applied some super glue to keep the hinges on tightly. C.He has pushed a box against the door to keep it shut. D.He has simply replaced the...