“完车”的英文是().A、FULLAHEADB、STANDBYENGINEC、STO 发布时间:2019-02-17 12:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: “完车”的英文是().A、FULLAHEADB、STANDBYENGINEC、STOPENGINED、FINISHEDWITHENGINE
题型:单项选择题 关系代数的运算可分为两类:传统的集合运算和专门的关系运算。下面列出的操作符中,哪些是属于传统的集合运算 Ⅰ.∪(并) Ⅱ.-(差) Ⅲ.∩(交) Ⅳ.×(广义笛卡尔积) Ⅴ.σ(选择) Ⅵ.为∏(投影) Ⅶ.(连接)A.Ⅰ、Ⅱ、Ⅴ和ⅥB.Ⅰ、Ⅱ、Ⅲ和ⅣC.Ⅳ、Ⅴ、Ⅵ和ⅦD.都是 查看答案
题型:单项选择题 An analyst does research about duration and gathers the following information about two option-free bonds in a portfolio: Bond Par value Market value Duration 1 $120000 $110000 5 2 $80000 $90000 4 The duration of the portfolio is closest to:()A. 4.33B. 4.40C. 4.55 查看答案