— Excuse me, where is Mr. Green's office? — Sorry, I don't know. I ___here for only a few days.
A.
work
B.
worked
C.
have worked
D.
will work
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举一反三
【单选题】If a portfolio has an expected return of 12% and the market risk-free rate is 3%. What is the sharpe ratio of this portfolio if the standard deviation of this portfolio is 3%?
【判断题】A portfolio contains two assets. The first asset comprises 40% of the portfolio and has a beta of 1.2. The other asset has a beta of 1.5. The portfolio beta is 1.35.