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单选题
（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.
A
Traffic Lane
B
Roundabout
C
Inshore Traffic Zone
D
Two-way Route
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only anchor in the separation zoneB
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endedB
terminativeC
terminationD
side
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a current will flowB
a power will developC
a heat will flowD
a pressure will produce
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