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无差异曲线足对一个特定的投资者而言，根据他对期望收益率和风险的偏好态度，按照期望收益率对风险补偿的要求，得到的一系列满意程度相同的(无差异)证券组合的均值方差(或标准差)在坐标系中所形成的曲线。无差异曲线满足下列（ ）特征。A.
无差异曲线向左上方倾斜
B.
无差异曲线向右上方倾斜
C.
无差异曲线的位置越高，其上的投资组合带来的满意程度就越高
D.
无曲线之间互不相交
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