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【判断题】
风险避免、风险预防、风险抑制以及风险分散都是风险控制的合理方法。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】以同志为核心的党的第一代领导集体提出了( )总路线,创造性地完成了由( )革命向( )革命的转变,使中国进入了( )社会。
【单选题】Which of the following is a difference between panel and pooled cross-sectional data?
A.
A panel data set consists of data on different cross-sectional units over a given period of time while a pooled data set consists of data on the same cross-sectional units over a given period of time.
B.
A panel data set consists of data on the same cross-sectional units over a given period of time while a pooled data set consists of data on different cross-sectional units over a given period of time
C.
A panel data consists of data on a single variable measured at a given point in time while a pooled data set consists of data on the same cross-sectional units over a given period of time .
D.
A panel data set consists of data on a single variable measured at a given point in time while a pooled data set consists of data on more than one variable at a given point in time.
【单选题】Which of the following is NOT a characteristic of a cross-sectional study?
A.
It is conducted at only one point in time.
B.
It can be exploratory, descriptive, or explanatory.
C.
It concentrates on the changes that take place among a specific sample over a period of time.
D.
It provides a means for studying a large population at the same point in time.
E.
All of these choices are characteristics of the cross-sectional study.
【单选题】听力原文：M: Excuse me, madam. I'm a stranger here and I'm running low on gas, but I can't seem to find a service station anywhere around here. Could you be kind enough to direct me to the nearest one? W: ...
A.
He needs a gas station.
B.
He lost his way home.
C.
He wants to go to the hospital.
D.
He lost the letter to be posted.
【单选题】听力原文：M: Excuse me, madam. I'm a stranger here and I'm running low on gas, but I can't seem to find a service station anywhere around here. Could you be kind enough to direct me to the nearest one? W: ...
A.
He needs a gas station.
B.
He lost his way home.
C.
He wants to go to the hospital.
D.
He lost the letter to be posted.
【简答题】横断面调查(cross—sectional in—regressiOn method)
【简答题】成本按经济用途可以分为哪几类？
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