direct current

The function of direct current regulated power supply is to input an alternating current power of 220volts, so that it can output __________.( ) A: alternating current 200 volts voltage B: direct current 24 volts voltage C: direct current 200 volts voltage D: alternating current 24 volts voltage

direct current是直流电

“direct current”的意思()

在电力电子变流技术中，将直流（Direct Current，简称DC）变换成直流（Direct Current，简称DC）的电力变换技术称之为

According to the current classification by SAIC ( 国家工商总局 ), the four categories of foreign direct investment in China include ________

中国大学MOOC: Alternating current（交流电） as a source of power has certain advantages over direct current（直流电）. 前后两个下划线介词短语分别充当_______。

Alternating current as a source of power has certain advantages over direct current. 前后两个下划线介词短语分别充当_______。

中国大学MOOC: 在电力电子变流技术中，将直流（Direct Current，简称DC）变换成交流（Alternating Current，简称AC）的电力变换技术称之为

β is the ratio of _____. A: collector current to emitter current B: base current to collector current C: collector current to base current D: emitter current to collector current