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【单选题】
水平角观测测站点为O，目标从依次为A、B、C、D，A为起始方向，B目标归零方向值为60°15′58″，D目标归零方向值为185°14′55″，则∠BOD的左角值为()。A.
124°58′57″
B.
235°01′03″
C.
245°30′53″
D.
无法确定
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