Automation System
The refresh-vector CRT uses which of the following techniques?

None of these
Uses an electron gun to continuously flood the surface of the tube.
Creates images on the screen by scanning straight-line vectors between selected points.
Makes changes on the image by increasing the anode voltage.
The beam constantly travels across the screen to turn on/off a series of pixels.

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Automation System
High-level languages:

are "procedure-oriented"
cannot be used with automatic systems.
require knowledge of the computer design
None of these
are very difficult to use

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