马科维茨的投资组合理论认为,在一定风险下,投资者追求预期收益的最大化,其投资组合理论基于以下假设()。
His illness was diagnosed as terminal(B级)cancer.
A. acute
B. chronic
C. final
D. fatal
When we think of Mir in terms of its achievements,its setbacks are_________.
Parents mnst observe classes regularly.
A. right
B. wrong
C. Not mentioned