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【简答题】
因故间断电气工作连续________个月以上者，应重新学习电力安全工作规程，并经考试合格后，恢复工作。
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反馈参考答案：
举一反三
【简答题】A．Because he has to pick up his wife at home. B．Because he wants to buy something in the supermarket. C．Because he has to work until five. D．Because he wants to have a rest in the afternoon.
【简答题】A．He is going to sign a contract. B．He is signing his check to buy something. C．He wants to skim through the piece. D．He wants to register his name to enroll a course.
【简答题】A．Because he has to pick up his wife at home． B．Because he wants to buy something in the supermarket. C．Because he has to work until five. D．Because he wants to have a rest in the afternoon.
【简答题】If someone wants to buy a travel card season ticket, what should he bring with him?
【单选题】五个样本率作比较，χ2＞χ20.01(4)，则在α=0.05的检验水准下，可认为
A.
各总体率不全等
B.
各总体率均不等
C.
各样本率均不等
D.
各样本率不全等
E.
至少有两个总体率相等
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