【单选题】自耦变压器的最大优点是输出电压可以调节,但是它不能作( )变压器。
【判断题】自耦变压器的输入端和输出端是完全可以对调的。
【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
【判断题】自耦变压器的最大优点是输出电压可以调节。
【单选题】自耦变压器输出的“低”压是()作为安全电压。
【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。 ( )