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Automation System - Section 4 :: Discussion
| 20. | The refresh-vector CRT uses which of the following techniques? | |
| A. | The beam constantly travels across the screen to turn on/off a series of pixels. | |
| B. | Makes changes on the image by increasing the anode voltage. | |
| C. | Uses an electron gun to continuously flood the surface of the tube. | |
| D. | Creates images on the screen by scanning straight-line vectors between selected points. | |
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