Language Work Prepositions of place
Date: 2015-10-07; view: 1009.
Language Work Function of an item
| We can describe the function of an item in a number of ways. Study these examples. Using the Present simple 1 ROM holds instructions which are needed to start up the computer. Used to-infinitive, Used for + -ing form 2 ROM is used to hold instructions which are needed to start up the computer. | 3 ROM is used for holding instructions which are needed to start up the computer. Emphasising the function 4 The function of ROM is to hold instructions which are needed to start up the computer. |
4 Match each item in Column A with its function in Column B. Then describe its function in two ways.
A ItemB Function
RAM controls the cursor
processor inputs data through keys like a typewriter
mouse displays the output from a computer on a screen
clock reads DVD-ROMs
monitor holds instructions which are needed to start up the computer
keyboard holds data read or written to it by the processor
DVD-ROM drive provides extremely fast access for sections of a program and its data
cache controls the timing of signals in the computer
ROM controls all the operations in a computer
5 Now describe the functions of these items.
1 scanner 3 ATM 5 hard disk drive 7 mainframe computer 9 swipe cards
2 printer 4 PDA 6 supercomputer 8 barcodes 10 memory
Study these examples of prepositions of place.
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 & Control
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Computer buses
1 Data moves between the CPU and RAM. 2 Data flows from ROM to the CPU.
3 A program is read from disk into memory. 6 The hard disk drive is inside a sealed case.
4 Data is transferred along the data bus. 7 Heads move across the disk.
5 The address number is put onto the address bus. 8 Tracks are divided into sectors.
6 Complete each sentence using the correct preposition.
1 The CPU is a large chip .. the computer.
2 Data always flows .. the CPU the address bus.
3 The CPU can be divided .. three parts.
4 Data flows .. the CPU and memory.
5 Peripherals are devices .. the computer but linked .. it.
6 The signal moves .. the VDU screen .. one side .. the other.
7 The CPU puts the address .. the address bus.
8 The CPU can fetch data .. memory .. the data bus.
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