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【单选题】
证券回购交易，是指证券买卖双方在成交的同时就约定某一时间以某一价格双方再行交易的行为。( )A.
正确
B.
错误
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A.
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【多选题】案发现场中 油类物证特点 之一是 组分易变 ,对此理解正确的是 ( )
A.
动、植物油脂易发生水解 ，但是难以发生 氧化反应。
B.
矿物油、香精油又极易挥发，因此它们的组成不稳定、成分易变
C.
尤其是 汽油长时间暴露在空气中或受环境温度等的影响，轻组分大部分会挥发掉。
D.
油类 检材 没有 及时提取，密封保存 ，也会导致 其成分变化
E.
现场的油类物证可能由于提取不当，也会造成其成分变化 。
【简答题】One day an old woman was traveling alone in the mountains. Suddenly she saw something shining in the stream. When she came close, she found it was a precious stone. She put the stone into her bag and ...
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