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【单选题】
若某电路的开路电压为120V,移除电源后,网络两端等效电阻为60Ω,则负载从该电源获得的最大功率是:A.
240W
B.
60W
C.
600W
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皮皮学刷刷变学霸
举一反三
【单选题】Jenny: Excuse me, Professor Smith. May I ask you a few questions? Smith: Yes, of course. But I’m sorry I have a meeting at ten. Why don’t you call me at my office hours? That is 3 to 6 p.m. Monday...
A.
He is busy now.
B.
He is too tired after the meeting.
C.
He will go to his office right now.
D.
It’s not in his office hour.
【简答题】升入初中的小丽,开始用日记来记录自己的所见所闻所感。 小丽的 “ 晚会记忆 ” : 学校2018年的元旦迎新表演选拔开始了。老师和同学们都推荐我代表班级演出,我真是异常的兴奋和自豪! 这周最后一次,我感到前所未有的紧张。别班同学的节目实在太强了,我真害怕自己不能坚持到最后...... 今天的迎新表演我彻底演砸了,我又一次唱跑了调,之后竟然忘词了!我辜负了同学、老师的期望,我给班级丢脸了,我要躲...
【单选题】— Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copperfield with you. —____. Who knows when he will be back here next time?
A.
It doesn’t matter
B.
Do as you like
C.
What a shame
D.
Take it easy
【简答题】翻译课文: Man Hello, I’d like to see Mr. Hunter, please. Woman I’m sorry, he isn’t here at the moment. Man Well, I’m here about the job. I’m Ricky Slater. Woman Nice to meet you. I’m Stella Watson, Mr. H...
【单选题】下列说法正确的是
A.
感应电流的磁场总是阻止原来磁场的变化
B.
感应电流的磁场总是与引起它的磁场方向相反
C.
通过闭合电路的磁通量越大则感应电流越大
D.
通过闭合电路的磁通为零时则不产生感应电流
【单选题】—Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copper Field with you. — _____ Who knows when he will be back here again?
A.
It doesn’t matter.
B.
Do as you like.
C.
What a shame!
D.
Take it easy.
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