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【多选题】
关于成本预测，下列说法正确的有（ ）A.
按预测的期限分，成本预测可以分为短期预测和长期预测
B.
按预测的内容分，成本预测可分为制订计划或方案阶段的成本预测和在计划实施过程中的成本预测
C.
短期预测是指对一年以内的预测，比如按月、按按年
D.
预测时间在一年以上的一般属于长期预测
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A.
小反馈活塞
B.
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C.
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D.
补偿针阀
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A.
正确
B.
错误
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