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【单选题】
下列何种指标小则其样本率估计总体率的可靠程度越大A.
率的标准差
B.
变异系数
C.
率的标准误
D.
样本阳性率
E.
样本量
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皮皮学刷刷变学霸
举一反三
【简答题】5 额定电压为UN,额定电流为IN的某三相鼠笼式异步电动机,采用表8.1所列的各种方法启动,请通过计算填写表内空格。 表8.1
【单选题】---Can I help you? ---Yes, I bought this radio here yesterday, but it _____________.
A.
didn’t work
B.
won’t work
C.
can’t work
D.
doesn’t work
【单选题】The judging panel________. 查看材料
A.
doesn't include women
B.
includes only women
C.
in only chosen from representatives of the industry
D.
includes someone from outside the industry
【单选题】She _________ watching TV, but she ____________ listening o the radio.
A.
like; doesn’t like
B.
likes; doesn’t like
C.
like; don’t like
D.
likes; don’t like
【简答题】* fair average quality F.A.Q
【单选题】The radio doesn’t work well; it needs_________.
A.
fixing
B.
being fixed
C.
to fix
D.
fixed
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