The word 'stagnate' in Paragraph 3 probably means______.
A．deteriorating
B．indebting
C．flourishing
D．stopping developing or advancing

判断题证券投资收益的最大化和投资风险的最小化这两个目标往往是矛盾的。()

未分类题From the first two paragraphs, we learn that______.A．aging brains tend to process more information simultaneouslyB．one becomes forgetful when he gets oldC．older people don't think their brainpower is decliningD．the aged always stress long-term benefit

判断题证券市场线一般用于估计一种证券的预期收益率，而证券特征线则用于描述一种证券的实际收益率。()

未分类题From the first paragraph, we can learn that investors confidence in German economy is .A．weakB．increasingC．optimisticD．subtle

判断题资本市场线上的每一点都表示由市场证券组合和无风险借贷综合计算出的收益率与风险的集合。()