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【判断题】
变流电路在工作过程中不断发生电流从一个支路向另一个支路的转移,称为换相。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】–My TV set doesn’t work, the water tap is dripping and my car is still under repair! –You sure ________ bad luck these days.
A.
had
B.
will have
C.
had had
D.
are having
【单选题】—Is this a TV or a computer? —________. [ ]
A.
Yes, it is.
B.
No, it isn't.
C.
Yes, it's
D.
It's a TV.
【单选题】Lily’s TV set is broken．She is going to have it ______.
A.
repair
B.
repairs
C.
repairing
D.
repaired
【单选题】–-My TV set doesn’t work, the water tap is dripping and my car is still under repair! –-You sure ________ bad luck these days.
A.
are having
B.
will have
C.
had had
D.
had
【简答题】It's very (er) ________ to repair the TV set like that.
【单选题】—Must I go and repair our TV set this afternoon? —No, you _______. I've repaired it. [ ]
A.
mustn't
B.
needn't
C.
shouldn't
D.
wouldn't
【简答题】5-23 某用户 10kV 变电所装有 1 台 1250kVA 干式配电变压器,电压比为 10/0.4kV ,联接组别为 Dyn11 。试依据 GB/ T 50062 — 2008 作出保护配置,整定计算电流保护动作电流,检验保护灵敏性。已知变压器低压侧最大三相短路电流为 21.6kA 、最小三相短路电流为 19.5kA 、最小单相对地短路电流为 18.5kA ,变压器高压侧最小三相短路电流为 7...
【单选题】Dee's TV Repair is the only TV repair shop in a small town. Dee is a single-price monopolist. Based on the demand and cost information in the table above, what quantity of TV repairs should Dee undert...
A.
0 per week
B.
10 per week
C.
20 per week
D.
30 per week
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