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【多选题】
水准路线的布设形式有（ ）。 A.附合水准路线 B.闭合水准路线 C.支水准路线 D.等外水准路线 E.四等水准路线A.
附合水准路线
B.
闭合水准路线
C.
支水准路线
D.
等外水准路线
E.
四等水准路线
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B.
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C.
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D.
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high spirits
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second class sea
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