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【多选题】
发电厂和变电所容易发生火灾的主要部位是( )。
A.
化水制备
B.
直排冷却泵
C.
电缆
D.
电气设备
E.
油系统
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参考答案:
举一反三
【单选题】She has found _____ at last.
A.
content
B.
contentment
C.
contended
D.
Discontentment
【单选题】Why does Jessie want to change her hair style?
A.
She has found a job.
B.
She has become a teacher.
C.
Her boss is dissatisfied with her hairstyle.
D.
All of the above.
【单选题】Rebecca found life on Everest is hard because ______.
A.
she has nothing but a toothbrush
B.
she is a clean person
C.
everything that is needed has to be carded on the back
【判断题】DSB-SC与常规AM信号频谱的最主要区别在于:DSB-SC信号频谱在载波频率处没有离散冲激分量
A.
正确
B.
错误
【判断题】DSB-SC与常规AM信号频谱的最主要区别在于:DSB-SC信号频谱在载波频率处没有离散冲激分量。
A.
正确
B.
错误
【单选题】Rebecca found life on Everest is hard because ______.
A.
she has nothing but a toothbrush
B.
she is a clean person
C.
everything that is needed has to be carried on the back
【单选题】三相功率实际上是( )个瓦特表组成的。
A.
1
B.
2
C.
3
D.
2或3
【简答题】A.She is expecting her turn. B.She has found valuable information. C.She needs another week to prepare. D.She has not prepared yet.
【简答题】A.She has already found her topic. B.She won't sleep tonight so as to figure out her topic. C.She is going to have a sound sleep tonight. D.She will think about her essay tomorrow.
【单选题】三相功率表实际上是( )个瓦特表组成的。
A.
1
B.
2
C.
3
D.
2或3
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