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【单选题】
针对中小企业板块的风险特征,在交易和监察制度上作出有别于主板市场的特别安排有( )。 I.改进开盘集合竞价制度和收盘价的确定方式,进一步提高市场透明度,遏制市场操行为 II.完善交易信息公开制度,引入涨跌幅、振幅及换手率的偏离值等监控指标 III.完善交易异常波动停牌制度,优化股票价量异常判定指标,及时揭示市场风险·减少息披露滞后或提前泄露的影响 IV.证券买卖采取一对一交易方式,中小企业板块价格决定机制不是公开竞价,而是买双方协商议价A.
ⅠⅡ
B.
ⅠⅡⅢ
C.
ⅡⅢⅣ
D.
ⅠⅡⅢⅣ
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A.
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B.
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