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【单选题】
下面哪一个不是回归分析要解决的问题（ ）A.
从一组样本数据出发，确定变量之间的数学关系式
B.
对数学关系式的可信程度进行各种统计检验，并从影响某一特定变量的诸多变量种找出哪些变量的影响是显著的，哪些是不显著的
C.
所求的关系式，根据一个或几个变量额取值来估计或预测另一个特定变量的取值
D.
度量两个变量之间的关系强度
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皮皮学刷刷变学霸
举一反三
【单选题】What should operators do if the caller is asking something that is not their business?
A.
Hang up the phone directly.
B.
Tell the caller he got the wrong number.
C.
Tell the caller which department he may call and transfer the call for them.
D.
Tell the caller that it is none of their business.
【单选题】When the receiver does not know the caller,( )
A.
the receiver should introduce himself and ask why the caller calls
B.
the caller should introduce himself and tell why he calls
C.
a brief introduction does not show good phone etiquette
D.
it is not necessary to make a simple introduction
【单选题】After taking down the telephone message from the caller, we must _____________ before ending the call.
A.
thanks the caller
B.
repeat the information
C.
appreciate the caller
D.
remind the caller to call back
【简答题】Yesterday we got into a(n) ______ (argue) about whether to accept or refuse the invitation.
【简答题】慢性风湿性心瓣膜病主要的致死原因是（ ）|急进型高血压多见的致死原因有（ ）|急进型心肌梗死24小时内死亡主要原因（ ）A. 心源性休克B. 心律失常C. 心力衰竭D. 脑卒中E. 尿毒症
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