-- card: 35736 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 4601
-- name: #128
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on openCard
  global group,rightone
  put 11 into group
  put "A" into rightone
  pass openCard
end openCard



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Question #128

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T3C10  What weather condition may cause tropospheric ducting?

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A stable high-pressure system

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An unstable low-pressure system

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A series of low-pressure waves

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Periods of heavy rainfall

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Correct answer is A