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【单选题】
下列关于变异系数的叙述正确的是( )A.
只能消除一组数据的水平对标准差的影响
B.
只能消除一组数据的计量单位对标准差的影响
C.
可以同时消除数据的水平和计量单位对标准差的影响
D.
可以准确反映一组数据的离散程度
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反馈参考答案：
举一反三
【简答题】厂商从销售其生产的产品中获得的金额叫 ( ) A．超额利润 B. 边际利润 C．边际收益 D. 收益
【单选题】听力原文：W：I demand to see the manager． M：The manager is out，Madam，but if you have a complaint，I’m sure I can assist you． Q：What’s the man’s attitude? (15)
A.
He is hostile.
B.
He is indifferent.
C.
He is snobbish.
D.
He is helpful.
【单选题】import java.io.*; class Person{ public void print(){System.out.print("Person ");} public void printMyGender(String s){ this.print(); System.out.print(s+" "); } } class Gender{ String type="gender"; pu...
A.
Person male Person female
B.
Person gender Person gender
C.
Manager male Employee female
D.
Manager gender Employee gender
【单选题】听力原文：W:I demand to see the manager． M: The manager is out，Madam．But did you have a complaint，I'm sure l can assist you． Q: What is the man's attitude? (13)
A.
He is hostile.
B.
He is indifferent.
C.
He is helpful.
D.
He is satisfactory.
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