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【单选题】
用方向观测法观测A.B.C.D 4个标志,A为零方向,B方向上半测回读数为81°54ˊ06〞,下半测回读数为261°54ˊ00〞,则B方向读数的平均值为()。A.
171°54ˊ03〞
B.
81°54ˊ03〞
C.
171°54ˊ06〞
D.
81°54ˊ06〞
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举一反三
【单选题】听力原文：M: If you are in a hurry, you can take the subway. If you want to go sightseeing, take a bus. W: Actually I don't have to be at the conference before noon. Q: What will the woman probably do? (13...
A.
She will take the subway.
B.
She will hurry to the conference.
C.
She will skip the conference and go sightseeing.
D.
She will take a bus.
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