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Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO
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qt8.dat
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1987-06-06
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227b
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7 lines
QUESTION: What is the solar-flux index?
A. A measure of past solar activity.
B. Another name for the American sun spot number.
C. Daily readings of sun spot activity.
D. Sun spot readings taken every six months.