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【多选题】
用电压电流表法测试电容器电容量,以下注意事项正确的是()。
A.
拆、接高压引线前,必须先对待试电容器逐只使用专用放电工具按先经电阻放电,后直接放电程序进行充分放电,放电后将待试电容器接地
B.
根据待试电容器电容量的大小选择接线方式,减小电压表或电流表的影响
C.
测试中应随时观察电压表、电流表读数,防止超过量程损坏表计
D.
合理选择电压表、电流表量程,试验电压、电流指示应至少达到表计满量程的1/2刻度处
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参考答案:
举一反三
【单选题】听力原文:M Well, Katherine, I've only been on the course for a few weeks, but you're in your third and final year F Yes, there's light at the end of the tunnel. It's hard, doing it part-time. M Have you e...
A.
the student presentations
B.
the reading requirements
C.
the attitude of her lecturers
【单选题】听力原文:M: I hope I won' t oversleep. I've simply got to catch the first flight to New York. W: If I were you, I' d request the wake-up call from the hotel reception. Q: What does the woman advise the ma...
A.
To cancel his trip.
B.
To catch a later flight.
C.
To go to bed early.
D.
To ask for a wake-up call.
【单选题】听力原文:M: I heard you've got the highest marks in our class. Congratulations! W: Thank you. I’m sure you’ve also done a good job. Q: Who are the speakers? (5)
A.
Two students.
B.
A student and a teacher.
C.
Two teachers.
D.
Two friends.
【单选题】下述那种固定相既可用于反相健合相色谱法的固定相,又可作为正相建合相色谱法的固定相:
A.
苯基固定相
B.
氰基固定相
C.
醚基固定相
D.
烷基固定相
【单选题】---- I’ve decided to attend the English speech, but I’m afraid I won’t be the best. ---- ______. You never know until you try.
A.
Forget it
B.
Go for it
C.
Good luck
D.
Never mind
【单选题】听力原文:M: I've had it with this job! I don't think I can put up with it anymore. W: Do you really mean you want to quit your job? M: Well, maybe I'd better give it a second thought. Q: What is the man g...
A.
Come back to give it another try.
B.
Try to get some more training instead of quitting the job.
C.
Work one more week.
D.
Think about whether he really wants to resign.
【判断题】これは 木村さん の鉛筆ですか。 木村さんの鉛筆です。
A.
正确
B.
错误
【简答题】W: I’ve been working out the gym since January. I was a bit out of shape. M: You look terrific. It seems that your effort has paid off. Q: What does the man imply about the woman?
【简答题】请填入适当的助词 1野球は日本_一番人気があるんです 2馬さんは何_すきですか 3木村さんはほか_ どんな趣味がありますか
【单选题】---- _____________? --- Fine, I've got used to the life there and I've made some friends.
A.
How are you
B.
How are you doing
C.
Are you getting on well
D.
How do you do
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