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【单选题】
如果对各观察值加上一个常数a，其标准差（）A.
扩大 倍
B.
扩大 a 倍
C.
扩大 a^ 2 倍
D.
不变
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【简答题】运输市场营销战略
【单选题】In an abstract, the main procedures or the materials and equipment used to create the final result of the research belong to _________.
A.
Introduction
B.
Purpose
C.
Method
D.
Product
【单选题】关键词:绝对定价模型、相对定价模型、NPV等与以下选题相关的是( )
A.
上市公司财务风险控制问题研究
B.
广发证券投资价值分析
C.
外贸企业汇率风险管理研究
D.
征信体系、金融互换与动态匹配问题探讨
【判断题】The research design specifications or the methodology used to collect secondary data should be examined to identify sources of bias.
A.
正确
B.
错误
【单选题】—Did Jenny clean her house yesterday? —She _______ because she was not quite herself.
A.
hadn’t cleaned it
B.
had it cleaned
C.
hasn’t cleaned it
D.
has it cleaned
【单选题】In an abstract, the main procedures or the materials and equipment used to create the final result of the research belong to _________.
A.
Product
B.
Method
C.
Introduction
D.
Purpose
【单选题】Which of the following sentencescan be used to establish significanceof the research subject in the Introduction Section?
A.
The concept of voice has become central to the study of written discourse and has been researched extensively in recent decades in the field of L2 writing.
B.
Research on evaluative language in academic texts has tended, rather, to focus her on published research articles.
C.
In this study, we used computer simulation to model the aerodynamic effect of the existing safety and comfort features.
D.
However, the resulting cover is aerodynamically ineffective due to the shape of the umbrella.
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