【多选题】关于自耦变压器描述正确的是:
D.
为保证安全,自耦变压器使用时必须找准零线和火线
【单选题】—Sorry,what did you say just now? --I asked .
D.
how I could get to the station
【简答题】AD 转换需进过 , , , 四个步骤。
【单选题】Did you say ___ ?
A.
that what he said was true
B.
what did he say was true
C.
that it was true that he said
D.
what he said it was true
【单选题】自耦变压器输出的“低”压是()作为安全电压。
【判断题】浆膜下肌瘤合并感染时,可排出脓性或血性白带
【判断题】220 / 20V 的单相自耦变压器,因其输出电压低,故可以触摸其输出端点。 ( )