Choose the best equivalent(s) to the underlined words and word combinations.

4. Underline participle II performing the function of an attribute

1. Programs and data can be entered into its memory and processed information can be displayed or transmitted in some form to the microprocessor user.

2. The VDU may be part of a self-contained microcomputer, with all the necessary circuitry contained in the case holding the CRT.

3. The output from the keyboard is decoded into a form suitable for the computer being used.

4. This function is usually carried out within the VDU which may also have its own buffer, so that information keyed in is not transmitted immediately. Other more sophisticated features may be available on more expensive VDUs.

5. With the latter facility, changes may be made to information displayed on the screen.

6. Often these facilities will be under the control of programs stored in ROMs on the VDU board.

7. Additionally, a light pen may be used as an input device by pointing it to the required on the screen.

8. Magnetic disks have data recorded on them in a series of circular tracks.

9. Indexes may be used to enable the required data to be located or data may be retrieved randomly by using relative addressing, in which data is recorded in known positions.

10. The units consist of a hard disk totally enclosed and sealed in a chamber.

11. It would ruin the head and disk resulting in the loss of all the information held on the disk.

12.Printers are used to spell out the information needed.

5. Underline the words with the ending – ing performing the function of an attribute

1. There are various types of peripheral equipment that may be attached to microcomputers including keyboards, visual display units (VDUs), magnetic recording devices, and printers for output.

2. Different sensors and actuators may be linked (interfaced) to the microcomputer for controlling instruments and machines.

3. These units have a cathode-ray tube (CRT) for displaying information.

4. The VDU may be part of a self-contained microcomputer, with all the necessary circuitry contained in the case holding the CRT.

5. Read/write heads are moved to the appropriate track for recording or accessing data under hardware/software control.

6. This ensures that extraneous particles of dust or dirt cannot get into the very small gap between the fast spinning disk and the floating read/write head, as this would cause a head-crash which would ruin the head and disk resulting in the loss of all the information held on the disk.

7. Laser printers, for example, are capable of printing miles of documents without stopping.

Date: 2015-01-02; view: 920