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- -- card: 40209 from stack: in
- -- bmap block id: 0
- -- flags: 0000
- -- background id: 2707
- -- name: #266
- ----- HyperTalk script -----
- on openCard
- global group,rightone
- put 21 into group
- put "C" into rightone
- pass openCard
- end openCard
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- -- part contents for background part 20
- ----- text -----
- Question #21
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- -- part contents for background part 1
- ----- text -----
- 2E-12-5.1 Signals above what frequency are usually called "radio-frequency" signals?
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- -- part contents for background part 11
- ----- text -----
- 20 Hz
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- -- part contents for background part 27
- ----- text -----
- 200 Hz
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- -- part contents for background part 28
- ----- text -----
- 20,000 Hz
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- -- part contents for background part 29
- ----- text -----
- 1,000,000 Hz
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- -- part contents for background part 43
- ----- text -----
- Correct answer is C