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问题 单项选择题

TDDLTE有多种帧格式，可以分为两种周期类型分别是（）。

A.5ms和10ms周期格式

B.15ms和20ms周期格式

C.10ms和15ms周期格式

D.5ms和20ms周期格式

答案

参考答案：A

单项选择题

On 1 January 2004, the value of an investor’s portfolio is $ 89000. The investor plans to donate $ 4000 to charity organization and pay $ 2000 to his insurance account on 31 December of 2004, but meanwhile he does not want the year-end portfolio value to be below $ 89000. If the expected return on the existing portfolio is 12 percent with a variance of 125, the safety-first ratio that would be used to evaluate the portfolio based on Roy’ s criterion is closest to:（）

A. 0.236.

B. 0.365.

C. 0.471.
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判断题

金融工具的特征包括期限性、流动性、风险性、收益性、稳定性。( )
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