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【单选题】
落地插座应具有牢固可靠的（ ）。A.
标志牌
B.
保护盖板
C.
开关
D.
以上都对
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皮皮学刷刷变学霸
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【简答题】儿童缺乏维生素D可出现______；孕妇、乳母和老人缺乏维生素D可出现______；老年人缺乏维生素D可出现______。
【简答题】The town's main _______ are its beautiful mosque and ancientmarketplace. A) features B) standpoint C) lifestyle D) venues
【简答题】如图所示电路中，N为线性有源二端网络，测得A，B之间电压为9V，如图(a)所示；若连接如图(b)所示，可测得电流I =1A。现连接成图(c)所示形式，问电流I 为（）A。【图片】
【简答题】如图所示电路，元件A的伏安特性为U=I 2 +1(I＞0)，求电流I和I 1 。
【简答题】听力原文：Every Roman town had a forum at its centre, where people came together to conduct their official and religious affairs. In addition, the forum was used as a meeting place. (83)
【简答题】The town is famous for its magnificent church towers.
【单选题】What doesn't the man like about the university town?
A.
Its size.
B.
Its newspaper.
C.
Its radio station.
D.
Its weather.
【单选题】Before the telephone was ______ , man had no way of talking to each other except face to face.
A.
invented
B.
discovered
C.
installed
D.
created
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