投影机试题(国外英文资料).docVIP

投影机试题(国外英文资料) Modern education technology research test - intermediate - projector test library The quantifiable performance indicators of the projector are not included. A brightness B resolution C contrast D shape; D ? The brightness of the projector is the (??) decision of A light bulb of A light bulb? a. ? What is correct about contrast is that A contrast is also called black and white contrast. The lower the contrast, the brighter the color. The higher the contrast, the higher the power of the bulb. ; a. ? The following information about the use of the projector is correct (?) A projector power supports hot plug. B projector lens is dirty and can be wiped directly with a cloth. Before C turns off the projector, make sure the projector power stops blinking. ; C ? A dirty dot on A white picture of the projector is dirty. A dirty dot on a white picture shows the lens dirty. A dirty dot on the white screen shows dust on the LCD panel. ; C ? In the projectors use, A bright spot is shown in the projected image (?) A lens has water droplets. B: its broken. C camera has been bad. ; B ? The projected image shows A partial color specification (??) A computer problem. B: its broken. C lens spent. ; B ? When the image is jiggled, you can use the following actions to stop the jitter (?) A modifiable sync button on the projection. B can adjust the function button C on the projection and hold it by hand. ; a. ? The output image of the projector is unstable, and the reason for the stripe fluctuation is that the power supply of A projector and signal source is not Shared. The B projector is surrounded by strong radiation. The C projector is broken. ; a. ? The projector in the screening process suddenly stops, and the temperature indicator turns to A red illustration (??) A projector cooling the problem. Problem with the power supply of B projector. The C projector is out of order. ; a. ? What is correct about the projector bulb is that A light bulb can be used indefinitely and