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【单选题】
持续用用热1小时后,出现短暂的相反作用是( )A.
局部效应
B.
继发效应
C.
远外效应
D.
后续效应
E.
反射效应
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举一反三
【单选题】听力原文：W: Hi,Bill.Have you finished the paper assigned by Professor Smith? M: Well,that's why I am still here rather than going to play basketball with my roommates. Q: What do we learn about the man fr...
A.
He will finish the paper rafter playing basketball.
B.
He hasn't finished doing his assignment yet.
C.
He stays in the dormitory with his roommates.
D.
He is playing basketball with his roommates.
【单选题】In the circuit, if , the current through the dependent source is:
A.
0A
B.
6A
C.
2A
D.
3A
【单选题】The voltage regulator controls the current through _____.
A.
The generator brushes
B.
The rotor
C.
The generator field
D.
All of the above
【简答题】有一本英文小说,他在计算机中用纯文本形式表示,文件扩展名为txt,大小为1KB,该小说所包含字母(字母,数字,标点符号等)的总数是 个
【简答题】— He hasn’t finished the work yet. — Well, he _____. A.ought B. ought to C. oughtto have D. ought to have finished
【简答题】晶闸管三个电极分别是阳极、阴极和[填空(1)]极，具有[填空(2)]性。A. 门（或控制）B. 单向可控导电
【单选题】The voltage across an inductor leads the current through it by .
A.
0 °
B.
90 °
C.
-90 °
D.
180 °
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