-Who's that at the door?
-_____ may be John. [ ]
A. It
B. Him
C. She
D. This
答案:A
“多CTA投资组合”的方差比单个CTA的方差小,多CTA投资策略能在相同的回报率的水平下,降低投资者的风险水平。( )
—When did your uncle arrive China?
—He got to Guangzhou the morning of the 16th of April. [ ]
A. at; in
B. in; in
C. to; on
D. in; on