-- card: 82128 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2707
-- name: #356
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on openCard
  global group,rightone
  put 30 into group
  put "D" into rightone
  pass openCard
end openCard



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Question #30

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2I-6.1 What is a "coaxial cable"?

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Two parallel conductors encased along the edges of a flat plastic ribbon.

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Two parallel conductors held at a fixed distance from each other by insulating rods.

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Two conductors twisted around each other in a double spiral.

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A center conductor encased in insulating material which is covered by a conducting sleeve or shield, and encased in a weatherproof jacket.

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Correct answer is D