多项选择题
Which of the four choices can be the purpose of traveling? A. To be an adventure to explore various places B. To see and experience how other cultures live C. To admire the wonders created by nature D. To get inspired
多项选择题 企业持有现金，主要出于交易性、预防性和投机性动机的三大需求，下列体现了交易性动机的是（ ）。
单项选择题 Information structure describes the way in which information is formally packaged within a _______. A、discourse B、text C、sentence D、paragraph
单项选择题 一组变量值中,若变量值均增加m，哪一项不变 () A、均数 B、几何均数 C、中位数 D、方差 E、四分位数间距
