单项选择题
A.10 B.8 C.12 D.14
A.G、GH B.V1、V2 C.轨出1 D.轨出2
A.20m±0.5m B.29m±0.5m C.16m±0.5m D.18m±0.5m
A.1个或3个 B.2个或3个 C.4个或5个 D.3个或4个
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