Automation System
The electronic component that has been the key to recent developments in automation is the:

integrated circuit
improved vacuum tube
transistor
diode
None of these

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

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

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