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【单选题】
-Do you know ______ before? -In the People's Hospital. [ ]A.
where is Tingting's father working
B.
where did Tingting's father work
C.
where Tingti ng's father is working
D.
where Tingting's father worked
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反馈参考答案：
举一反三
【单选题】更换动力电源插接件应注意:()。
A.
拆下维修开关时需要佩戴绝缘手套
B.
拆下维修开关把手前，务必将电源开关置于O错错位置（关闭SMR）以确保安全
C.
维修开关把手拆下后摇放在口袋内携带，以确保安全
D.
包括以上三项
【简答题】单位阶跃函数的拉普拉斯变换结果是什么？单位斜坡函数的拉氏变换结果是什么？
【单选题】听力原文：M: May I help you? W: Yes, my nephew is graduating from college next week and I'd like to get him a nice gift. M: How much would you like to spend for the gift? W: Well, I usually spend about 20 ...
A.
In a post office.
B.
In a store.
C.
In a library.
D.
In a laboratory.
【单选题】根据牙松动的方向确定II度牙松动是。
A.
颊舌向松动
B.
近远中向松动、
C.
颊舌向和近、远中向松动
D.
颊舌向、近远中向和垂直向松动
E.
颊舌向松动、垂直向松动
【简答题】The boy who just went out is my nephew.
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