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card_98622.txt
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Text File
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1991-04-08
|
911b
|
42 lines
-- card: 98622 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 7720
-- name: #319
----- HyperTalk script -----
on openCard
global group,rightone
put 31 into group
put "B" into rightone
pass openCard
end openCard
-- part contents for background part 20
----- text -----
Question #31
-- part contents for background part 1
----- text -----
4BG-4B.1 How can "selectivity" be achieved in the front-end circuitry of a communications receiver?
-- part contents for background part 11
----- text -----
By using an audio filter
-- part contents for background part 27
----- text -----
By using a preselector
-- part contents for background part 28
----- text -----
By using an additional RF amplifier stage
-- part contents for background part 29
----- text -----
By using an additional IF amplifier stage
-- part contents for background part 43
----- text -----
Correct answer is B