I _____ to study English in 1998. ()
A.began
B.begun
C.begin
D.beginning
- · 有4位网友选择 B,占比50%
- · 有2位网友选择 D,占比25%
- · 有2位网友选择 C,占比25%
A.began
B.begun
C.begin
D.beginning
-- _________.
A.That's right
B.I'm sorry to hear that
C.Thanks a lot
D.Oh, I'm very glad
Considering a simple portfolio investment strategy: holding N risky assets that have identical expected returns, E(r), and standard deviations, σ, and putting 1/N of your money in each. Assume that the correlation coefficients of all pairs are ρ. Denote the standard deviation of each asset and the portfolio are σ and σP, respectively. The variance of the portfolio can be expressed asWhich of the following statements is correct?
A、The first part of the expression represents the non-diversifiable risk
B、The second part of the expression represents the non-diversifiable risk
C、If ρ=1, all risk can be diversified
D、If ρ=-1, all risk can be diversified
四.根据短文的意思,选择正确的答案。 Miss Lee is only twenty-one . She is tall and thin , and she has brown , long hair . She likes children and her teaching work . From Monday to Friday she stays at school and gives the children classes . She has much work to do , but she often plays games with her students after school . The children like her very much . On Sunday she drives her car to her father’s house and stays with her father and mother . Sometimes she goes to see her friends on Sunday . She drives back to school on Monday morning. She likes singing , dancing and swimming . She’s a nice teacher . ( )36. Miss Lee is a ________ teacher .
A、very good
B、very old
C、good English
D、good Chinese
A、She has no work to do after plays with the children .
B、She plays with the children from Monday to Friday .
C、She likes her students and plays games with them .
D、She always (总是) works , but doesn’t play at all .
A、every day
B、on Sunday
C、on Saturday
D、on Friday
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