1 Ann had done her homework before Mary phoned her. 2 My father had repaired his car after I came home from school. 3 We had visited our granny by 6 o'clock. 4 When he entered the house understood that somebody had already been there. 5 After he had written a letter he went to the post office. 6 Before we had started travelling we bought all necessary things. 7 Bob hadn't read this magazine by 9 o'clock. 8 My mother had cleaned the flat by the end of the day. 9 They had met Peter after they went to the shop. 10 When the Browns came to the theater the performance had already begun.
1) There are three types of printers, such as character printers, line printers and page printers. 2)A letter- quality printer is a character printer which produces output of typewriter quality. 3) A dot-matrix printer, is is a printer, that forms each character as a pattern of dots. 4) Character printers 5) Line printer 6)Impact printers are electromechanical machines used for high- volume paper output on most computer systems. Their printing speeds are such that to an observer they appear to be printing a line at a time. 7) A non impact printer is a page printer, their printing rates are so high that output appears to emerge from the printer a page at a time. 8) line and character printers 9) a dot matrix printer forms every character out of dots, but a letter quality has a typewriter quality 10) letter quality 11) - 12) - 13) Drum printers and chain printers. 14) They use electrophotographic techniques.
2 My father had repaired his car after I came home from school.
3 We had visited our granny by 6 o'clock.
4 When he entered the house understood that somebody had already been there.
5 After he had written a letter he went to the post office.
6 Before we had started travelling we bought all necessary things.
7 Bob hadn't read this magazine by 9 o'clock.
8 My mother had cleaned the flat by the end of the day.
9 They had met Peter after they went to the shop.
10 When the Browns came to the theater the performance had already begun.
2)A letter-
quality printer is a character printer which produces output of
typewriter quality.
3) A dot-matrix printer, is is a printer, that forms each character as a pattern of dots.
4) Character printers
5) Line printer
6)Impact printers are electromechanical machines used for high-
volume paper output on most computer systems. Their printing speeds are such that to an observer they appear to be printing a line at a time.
7) A non impact printer is a page printer, their printing rates are so high that output appears to emerge from the
printer a page at a time.
8) line and character printers
9) a dot matrix printer forms every character out of dots, but a letter quality has a typewriter quality
10) letter quality
11) -
12) -
13) Drum printers and chain printers.
14) They use electrophotographic techniques.