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【单选题】
下列叙述中正确的是()A.
只有在重复抽样的条件下，样本均值的期望值才等于总体均值
B.
只有在非重复抽样的条件下，样本均值的期望值才等于总体均值
C.
样本均值的期望总是等于总体均值
D.
样本均值总是等于总体均值
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反馈参考答案：
举一反三
【单选题】The policeman warned the man ( ) after drinking.
A.
not to drive
B.
to drive
C.
driving
D.
not to driving
【单选题】She asked Tom _____________ with his car
A.
what is the matter
B.
what was the matter
C.
what the matter is
D.
what the matter was
【单选题】–What did your mother say, Tom? -She asked me why ____.
A.
my sister crying
B.
my sister was crying
C.
is my sister crying
D.
was my sister crying
【单选题】下列不属于企业管理的特征的是( )
A.
企业管理是一种文化现象
B.
企业管理的主体是管理者
C.
管理既是一门科学,又是一种艺术
D.
企业管理的核心是处理好人际关系
【单选题】---What did your teacher say this morning? --She asked me this morning.
A.
how did Tom come to school
B.
why was Tom late for school
C.
when Tom would get to school
D.
what will Tom do at school
【单选题】肾结核病人早期仅有的异常表现
A.
大量肉眼血尿
B.
肾区疼痛、肿块
C.
全身慢性消耗症状
D.
静脉肾盂造影显示肾盂有破坏
E.
尿呈酸性,有少量蛋白和红细胞、白细胞
【简答题】She said to Tom, “Can you help me?”(改为间接引语) She asked Tom__________________.
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