【单选题】一般而言,抽样的样本规模占总体的比例同抽样误差( )
【单选题】What is true between data modeling and the formatting of the data?
A.
There is always one specific schema for storing model data that is the best and preferred method for the specific data representation.
B.
There is a one to one correspondence between formatting data and data modeling. For every model of data, there is only one way to store the data.
C.
The data does not necessarily need to be formatted in a way that represents the data model. Just so long as it can be extrapolated.
【单选题】What is a data item?
A.
The real worth of a data value.
B.
Data found in a customer transaction.
C.
Data found in a mediated schema.
D.
Data that represents an aspect of a real-world entity.
【简答题】Part I Dictation Title : Sleep
【简答题】Mini-lecture 1 1. What is conte xtualiz ation?
【判断题】阻容耦合和变压器耦合放大器不能用来放大直流信号。
【单选题】以下____不是尾机型船在空载航行时必须进行压载主要原因。
【简答题】What types of definition have you learned in Mini-lecture 2? In what way do they mainly differ?
【简答题】What sort of data dose John provide first? What is the conclusion drawn from the data?
【简答题】In what way is Portable Mini Fridge superior to an Esky? B) It carries more food and drinks. C) It is larger. D) It looks more beautiful.